21052964707 has 4 divisors (see below), whose sum is σ = 21053367936. Its totient is φ = 21052561480.

The previous prime is 21052964701. The next prime is 21052964731. The reversal of 21052964707 is 70746925012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21052964707 - 2⁷ = 21052964579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21052964701) 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, 109168 + ... + 232429.

It is an arithmetic number, because the mean of its divisors is an integer number (5263341984).

Almost surely, 2^21052964707 is an apocalyptic number.

21052964707 is a deficient number, since it is larger than the sum of its proper divisors (403229).

21052964707 is an equidigital number, since it uses as much as digits as its factorization.

21052964707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403228.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 21052964707 in words is "twenty-one billion, fifty-two million, nine hundred sixty-four thousand, seven hundred seven".