18765642424 has 32 divisors (see below), whose sum is σ = 36936230400. Its totient is φ = 8926241760.

The previous prime is 18765642419. The next prime is 18765642439. The reversal of 18765642424 is 42424656781.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626622 + ... + 655885.

It is an arithmetic number, because the mean of its divisors is an integer number (1154257200).

Almost surely, 2^18765642424 is an apocalyptic number.

It is an amenable number.

18765642424 is a deficient number, since it is larger than the sum of its proper divisors (18170587976).

18765642424 is a wasteful number, since it uses less digits than its factorization.

18765642424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282603 (or 1282599 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 49.

The spelling of 18765642424 in words is "eighteen billion, seven hundred sixty-five million, six hundred forty-two thousand, four hundred twenty-four".