19156939080 has 64 divisors (see below), whose sum is σ = 57923389440. Its totient is φ = 5068288512.

The previous prime is 19156939063. The next prime is 19156939091. The reversal of 19156939080 is 8093965191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613269 + ... + 643748.

It is an arithmetic number, because the mean of its divisors is an integer number (905052960).

Almost surely, 2^19156939080 is an apocalyptic number.

19156939080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19156939080 is an abundant number, since it is smaller than the sum of its proper divisors (38766450360).

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

19156939080 is a wasteful number, since it uses less digits than its factorization.

19156939080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257158 (or 1257154 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 51.

The spelling of 19156939080 in words is "nineteen billion, one hundred fifty-six million, nine hundred thirty-nine thousand, eighty".