21313652430 has 64 divisors (see below), whose sum is σ = 58473082368. Its totient is φ = 4870627200.

The previous prime is 21313652429. The next prime is 21313652441. The reversal of 21313652430 is 3425631312.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1346844 + ... + 1362576.

It is an arithmetic number, because the mean of its divisors is an integer number (913641912).

Almost surely, 2^21313652430 is an apocalyptic number.

21313652430 is an abundant number, since it is smaller than the sum of its proper divisors (37159429938).

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

21313652430 is a wasteful number, since it uses less digits than its factorization.

21313652430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201.

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

The spelling of 21313652430 in words is "twenty-one billion, three hundred thirteen million, six hundred fifty-two thousand, four hundred thirty".