18949660024 has 32 divisors (see below), whose sum is σ = 36401310000. Its totient is φ = 9243182592.

The previous prime is 18949660021. The next prime is 18949660027. The reversal of 18949660024 is 42006694981.

It is an interprime number because it is at equal distance from previous prime (18949660021) and next prime (18949660027).

It is a self number, because there is not a number n which added to its sum of digits gives 18949660024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949660021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251952 + ... + 318400.

Almost surely, 2^18949660024 is an apocalyptic number.

It is an amenable number.

18949660024 is a deficient number, since it is larger than the sum of its proper divisors (17451649976).

18949660024 is a wasteful number, since it uses less digits than its factorization.

18949660024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67327 (or 67323 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 18949660024 in words is "eighteen billion, nine hundred forty-nine million, six hundred sixty thousand, twenty-four".