18874403768 has 48 divisors (see below), whose sum is σ = 40946577000. Its totient is φ = 8127725760.

The previous prime is 18874403767. The next prime is 18874403771. The reversal of 18874403768 is 86730447881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874403767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 494723 + ... + 531506.

Almost surely, 2^18874403768 is an apocalyptic number.

It is an amenable number.

18874403768 is an abundant number, since it is smaller than the sum of its proper divisors (22072173232).

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

18874403768 is a wasteful number, since it uses less digits than its factorization.

18874403768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026276 (or 1026261 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 56.

The spelling of 18874403768 in words is "eighteen billion, eight hundred seventy-four million, four hundred three thousand, seven hundred sixty-eight".