18914431828040 has 64 divisors (see below), whose sum is σ = 48717237888000. Its totient is φ = 6474264392448.

The previous prime is 18914431828009. The next prime is 18914431828049. The reversal of 18914431828040 is 4082813441981.

It is a super-2 number, since 2×18914431828040² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18914431828049) 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, 55473815 + ... + 55813734.

It is an arithmetic number, because the mean of its divisors is an integer number (761206842000).

Almost surely, 2^{18914431828040} is an apocalyptic number.

18914431828040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18914431828040 is an abundant number, since it is smaller than the sum of its proper divisors (29802806059960).

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

18914431828040 is a wasteful number, since it uses less digits than its factorization.

18914431828040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111288174 (or 111288170 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 53.

The spelling of 18914431828040 in words is "eighteen trillion, nine hundred fourteen billion, four hundred thirty-one million, eight hundred twenty-eight thousand, forty".