18920635224 has 16 divisors (see below), whose sum is σ = 47301588120. Its totient is φ = 6306878400.

The previous prime is 18920635207. The next prime is 18920635243. The reversal of 18920635224 is 42253602981.

It is a congruent number.

It is an unprimeable number.

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, 394179877 + ... + 394179924.

Almost surely, 2^18920635224 is an apocalyptic number.

It is an amenable number.

18920635224 is an abundant number, since it is smaller than the sum of its proper divisors (28380952896).

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

18920635224 is a wasteful number, since it uses less digits than its factorization.

18920635224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788359810 (or 788359806 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 18920635224 in words is "eighteen billion, nine hundred twenty million, six hundred thirty-five thousand, two hundred twenty-four".