19009239870 has 64 divisors (see below), whose sum is σ = 49247377920. Its totient is φ = 4681531008.

The previous prime is 19009239869. The next prime is 19009239901. The reversal of 19009239870 is 7893290091.

It is a super-2 number, since 2×19009239870² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454984 + ... + 495003.

It is an arithmetic number, because the mean of its divisors is an integer number (769490280).

Almost surely, 2^19009239870 is an apocalyptic number.

19009239870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19009239870 is an abundant number, since it is smaller than the sum of its proper divisors (30238138050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19009239870 is a wasteful number, since it uses less digits than its factorization.

19009239870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950049.

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 19009239870 in words is "nineteen billion, nine million, two hundred thirty-nine thousand, eight hundred seventy".