18628777112031 has 16 divisors (see below), whose sum is σ = 27703124401920. Its totient is φ = 12371963501880.

The previous prime is 18628777112017. The next prime is 18628777112041. The reversal of 18628777112031 is 13021177782681.

18628777112031 is a `hidden beast` number, since 1 + 8 + 628 + 7 + 7 + 7 + 1 + 1 + 2 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 18628777112031 - 2⁴¹ = 16429753856479 is a prime.

It is a super-2 number, since 2×18628777112031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628777112041) 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, 1311693865 + ... + 1311708066.

It is an arithmetic number, because the mean of its divisors is an integer number (1731445275120).

Almost surely, 2^{18628777112031} is an apocalyptic number.

18628777112031 is a deficient number, since it is larger than the sum of its proper divisors (9074347289889).

18628777112031 is a wasteful number, since it uses less digits than its factorization.

18628777112031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623402203 (or 2623402197 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The spelling of 18628777112031 in words is "eighteen trillion, six hundred twenty-eight billion, seven hundred seventy-seven million, one hundred twelve thousand, thirty-one".