18631257881054 has 32 divisors (see below), whose sum is σ = 34420238973120. Its totient is φ = 7365449532672.

The previous prime is 18631257881029. The next prime is 18631257881059. The reversal of 18631257881054 is 45018875213681.

It is a junction number, because it is equal to n+sod(n) for n = 18631257880984 and 18631257881002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18631257881059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35558519 + ... + 36078674.

It is an arithmetic number, because the mean of its divisors is an integer number (1075632467910).

Almost surely, 2^{18631257881054} is an apocalyptic number.

18631257881054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18631257881054 is a deficient number, since it is larger than the sum of its proper divisors (15788981092066).

18631257881054 is a wasteful number, since it uses less digits than its factorization.

18631257881054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71638644.

The product of its (nonzero) digits is 12902400, while the sum is 59.

The spelling of 18631257881054 in words is "eighteen trillion, six hundred thirty-one billion, two hundred fifty-seven million, eight hundred eighty-one thousand, fifty-four".