21052631793 has 4 divisors (see below), whose sum is σ = 28070175728. Its totient is φ = 14035087860.

The previous prime is 21052631783. The next prime is 21052631797. The reversal of 21052631793 is 39713625012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21052631793 - 2⁶ = 21052631729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21052631797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3508771963 + ... + 3508771968.

It is an arithmetic number, because the mean of its divisors is an integer number (7017543932).

Almost surely, 2^21052631793 is an apocalyptic number.

It is an amenable number.

21052631793 is a deficient number, since it is larger than the sum of its proper divisors (7017543935).

21052631793 is an equidigital number, since it uses as much as digits as its factorization.

21052631793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017543934.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 21052631793 in words is "twenty-one billion, fifty-two million, six hundred thirty-one thousand, seven hundred ninety-three".