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19674887906 = 261792041387
BaseRepresentation
bin10010010100101101…
…101111011011100010
31212210011202212022002
4102110231233123202
5310243232403111
613012153044002
71264363534142
oct222455573342
955704685262
1019674887906
118386a63543
1239910b6602
131b1722690b
14d49056922
157a244b63b
hex494b6f6e2

19674887906 has 16 divisors (see below), whose sum is σ = 30375853440. Its totient is φ = 9553686480.

The previous prime is 19674887891. The next prime is 19674887957. The reversal of 19674887906 is 60978847691.

It is a super-2 number, since 2×196748879062 (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011056 + ... + 1030331.

It is an arithmetic number, because the mean of its divisors is an integer number (1898490840).

Almost surely, 219674887906 is an apocalyptic number.

19674887906 is a deficient number, since it is larger than the sum of its proper divisors (10700965534).

19674887906 is a wasteful number, since it uses less digits than its factorization.

19674887906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041529.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 19674887906 in words is "nineteen billion, six hundred seventy-four million, eight hundred eighty-seven thousand, nine hundred six".

Divisors: 1 2 61 79 122 158 4819 9638 2041387 4082774 124524607 161269573 249049214 322539146 9837443953 19674887906