21352602630 has 32 divisors (see below), whose sum is σ = 51450432768. Its totient is φ = 5671340000.

The previous prime is 21352602617. The next prime is 21352602631. The reversal of 21352602630 is 3620625312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352602631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410306 + ... + 1425365.

It is an arithmetic number, because the mean of its divisors is an integer number (1607826024).

Almost surely, 2^21352602630 is an apocalyptic number.

21352602630 is an abundant number, since it is smaller than the sum of its proper divisors (30097830138).

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

21352602630 is a wasteful number, since it uses less digits than its factorization.

21352602630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835932.

The product of its (nonzero) digits is 12960, while the sum is 30.

The spelling of 21352602630 in words is "twenty-one billion, three hundred fifty-two million, six hundred two thousand, six hundred thirty".