21702234924 has 18 divisors (see below), whose sum is σ = 54858427260. Its totient is φ = 7234078296.

The previous prime is 21702234919. The next prime is 21702234937. The reversal of 21702234924 is 42943220712.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 602839859 = 21702234924 / (2 + 1 + 7 + 0 + 2 + 2 + 3 + 4 + 9 + 2 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 301419894 + ... + 301419965.

Almost surely, 2^21702234924 is an apocalyptic number.

It is an amenable number.

21702234924 is an abundant number, since it is smaller than the sum of its proper divisors (33156192336).

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

21702234924 is a wasteful number, since it uses less digits than its factorization.

21702234924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602839869 (or 602839864 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21702234924 in words is "twenty-one billion, seven hundred two million, two hundred thirty-four thousand, nine hundred twenty-four".