18857855944934 has 16 divisors (see below), whose sum is σ = 29032323019056. Its totient is φ = 9181297756800.

The previous prime is 18857855944933. The next prime is 18857855944943. The reversal of 18857855944934 is 43944955875881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18857855944933) 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, 220661552 + ... + 220746995.

It is an arithmetic number, because the mean of its divisors is an integer number (1814520188691).

Almost surely, 2^{18857855944934} is an apocalyptic number.

18857855944934 is a deficient number, since it is larger than the sum of its proper divisors (10174467074122).

18857855944934 is a wasteful number, since it uses less digits than its factorization.

18857855944934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441409111.

The product of its digits is 6967296000, while the sum is 80.

The spelling of 18857855944934 in words is "eighteen trillion, eight hundred fifty-seven billion, eight hundred fifty-five million, nine hundred forty-four thousand, nine hundred thirty-four".