21642024612 has 48 divisors (see below), whose sum is σ = 54608271872. Its totient is φ = 6631441920.

The previous prime is 21642024601. The next prime is 21642024617.

21642024612 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21642024612.

It is not an unprimeable number, because it can be changed into a prime (21642024617) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 250228 + ... + 325419.

Almost surely, 2^21642024612 is an apocalyptic number.

It is an amenable number.

21642024612 is an abundant number, since it is smaller than the sum of its proper divisors (32966247260).

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

21642024612 is a wasteful number, since it uses less digits than its factorization.

21642024612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575908 (or 575906 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 21642024612 in words is "twenty-one billion, six hundred forty-two million, twenty-four thousand, six hundred twelve".