21152620352 has 112 divisors (see below), whose sum is σ = 46193049600. Its totient is φ = 9572359680.

The previous prime is 21152620343. The next prime is 21152620397. The reversal of 21152620352 is 25302625112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2974433 + ... + 2981535.

Almost surely, 2^21152620352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152620352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23096524800).

21152620352 is an abundant number, since it is smaller than the sum of its proper divisors (25040429248).

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

21152620352 is a wasteful number, since it uses less digits than its factorization.

21152620352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244 (or 7234 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 21152620352 in words is "twenty-one billion, one hundred fifty-two million, six hundred twenty thousand, three hundred fifty-two".