21624242612 has 24 divisors (see below), whose sum is σ = 43676693760. Its totient is φ = 9175773600.

The previous prime is 21624242599. The next prime is 21624242617.

21624242612 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21624242617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820412 + ... + 3826067.

It is an arithmetic number, because the mean of its divisors is an integer number (1819862240).

Almost surely, 2^21624242612 is an apocalyptic number.

It is an amenable number.

21624242612 is an abundant number, since it is smaller than the sum of its proper divisors (22052451148).

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

21624242612 is a wasteful number, since it uses less digits than its factorization.

21624242612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7646591 (or 7646589 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The spelling of 21624242612 in words is "twenty-one billion, six hundred twenty-four million, two hundred forty-two thousand, six hundred twelve".