18878855296 has 64 divisors (see below), whose sum is σ = 43004162880. Its totient is φ = 8086975488.

The previous prime is 18878855293. The next prime is 18878855299. The reversal of 18878855296 is 69255887881.

It is an interprime number because it is at equal distance from previous prime (18878855293) and next prime (18878855299).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×18878855296² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18878855293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2507730 + ... + 2515246.

It is an arithmetic number, because the mean of its divisors is an integer number (671940045).

Almost surely, 2^18878855296 is an apocalyptic number.

18878855296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18878855296 is an abundant number, since it is smaller than the sum of its proper divisors (24125307584).

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

18878855296 is an equidigital number, since it uses as much as digits as its factorization.

18878855296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341 (or 10329 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 67.

The spelling of 18878855296 in words is "eighteen billion, eight hundred seventy-eight million, eight hundred fifty-five thousand, two hundred ninety-six".