18787444924 has 12 divisors (see below), whose sum is σ = 33679932048. Its totient is φ = 9164607200.

The previous prime is 18787444919. The next prime is 18787444927. The reversal of 18787444924 is 42944478781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787444927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57278632 + ... + 57278959.

It is an arithmetic number, because the mean of its divisors is an integer number (2806661004).

Almost surely, 2^18787444924 is an apocalyptic number.

It is an amenable number.

18787444924 is a deficient number, since it is larger than the sum of its proper divisors (14892487124).

18787444924 is a wasteful number, since it uses less digits than its factorization.

18787444924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114557636 (or 114557634 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 58.

The spelling of 18787444924 in words is "eighteen billion, seven hundred eighty-seven million, four hundred forty-four thousand, nine hundred twenty-four".