18816641891310 has 64 divisors (see below), whose sum is σ = 47030718312000. Its totient is φ = 4812229481472.

The previous prime is 18816641891239. The next prime is 18816641891323. The reversal of 18816641891310 is 1319814661881.

It is a super-2 number, since 2×18816641891310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72448639 + ... + 72707898.

It is an arithmetic number, because the mean of its divisors is an integer number (734854973625).

Almost surely, 2^{18816641891310} is an apocalyptic number.

18816641891310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18816641891310 is an abundant number, since it is smaller than the sum of its proper divisors (28214076420690).

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

18816641891310 is a wasteful number, since it uses less digits than its factorization.

18816641891310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145156725.

The product of its (nonzero) digits is 1990656, while the sum is 57.

The spelling of 18816641891310 in words is "eighteen trillion, eight hundred sixteen billion, six hundred forty-one million, eight hundred ninety-one thousand, three hundred ten".