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19009239877 = 1741157173713
BaseRepresentation
bin10001101101000010…
…011111101101000101
31211001210020102212101
4101231002133231011
5302412331134002
612422133552101
71242031605265
oct215502375505
954053212771
1019009239877
118075247301
1238261a5631
131a3c354344
14cc48a17a5
15763cb2587
hex46d09fb45

19009239877 has 16 divisors (see below), whose sum is σ = 20749789872. Its totient is φ = 17343406080.

The previous prime is 19009239869. The next prime is 19009239901. The reversal of 19009239877 is 77893290091.

It is a Cunningham number, because it is equal to 1378742+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 19009239876 = 1^2 + 137874^2 .

It is a cyclic number.

It is not a de Polignac number, because 19009239877 - 23 = 19009239869 is a prime.

It is a super-2 number, since 2×190092398772 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19009233877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22573 + ... + 196285.

It is an arithmetic number, because the mean of its divisors is an integer number (1296861867).

Almost surely, 219009239877 is an apocalyptic number.

19009239877 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19009239877 is a deficient number, since it is larger than the sum of its proper divisors (1740549995).

19009239877 is a wasteful number, since it uses less digits than its factorization.

19009239877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173928.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 19009239877 in words is "nineteen billion, nine million, two hundred thirty-nine thousand, eight hundred seventy-seven".

Divisors: 1 17 41 157 697 2669 6437 109429 173713 2953121 7122233 27272941 121077961 463639997 1118190581 19009239877