18631964860 has 12 divisors (see below), whose sum is σ = 39127126248. Its totient is φ = 7452785936.

The previous prime is 18631964843. The next prime is 18631964873. The reversal of 18631964860 is 6846913681.

It is a super-2 number, since 2×18631964860² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18631964798 and 18631964807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465799102 + ... + 465799141.

It is an arithmetic number, because the mean of its divisors is an integer number (3260593854).

Almost surely, 2^18631964860 is an apocalyptic number.

18631964860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18631964860 is an abundant number, since it is smaller than the sum of its proper divisors (20495161388).

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

18631964860 is a wasteful number, since it uses less digits than its factorization.

18631964860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931598252 (or 931598250 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 18631964860 in words is "eighteen billion, six hundred thirty-one million, nine hundred sixty-four thousand, eight hundred sixty".