21452353624 has 16 divisors (see below), whose sum is σ = 43317252720. Its totient is φ = 9901086240.

The previous prime is 21452353613. The next prime is 21452353631. The reversal of 21452353624 is 42635325412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103136212 + ... + 103136419.

It is an arithmetic number, because the mean of its divisors is an integer number (2707328295).

Almost surely, 2^21452353624 is an apocalyptic number.

It is an amenable number.

21452353624 is an abundant number, since it is smaller than the sum of its proper divisors (21864899096).

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

21452353624 is a wasteful number, since it uses less digits than its factorization.

21452353624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206272650 (or 206272646 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The spelling of 21452353624 in words is "twenty-one billion, four hundred fifty-two million, three hundred fifty-three thousand, six hundred twenty-four".