18435916924 has 6 divisors (see below), whose sum is σ = 32262854624. Its totient is φ = 9217958460.

The previous prime is 18435916921. The next prime is 18435916943. The reversal of 18435916924 is 42961953481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18435916921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304489612 + ... + 2304489619.

Almost surely, 2^18435916924 is an apocalyptic number.

It is an amenable number.

18435916924 is a deficient number, since it is larger than the sum of its proper divisors (13826937700).

18435916924 is a wasteful number, since it uses less digits than its factorization.

18435916924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608979235 (or 4608979233 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The spelling of 18435916924 in words is "eighteen billion, four hundred thirty-five million, nine hundred sixteen thousand, nine hundred twenty-four".