20949697995 has 16 divisors (see below), whose sum is σ = 33522031872. Its totient is φ = 11172333920.

The previous prime is 20949697987. The next prime is 20949698027. The reversal of 20949697995 is 59979694902.

It is not a de Polignac number, because 20949697995 - 2³ = 20949697987 is a prime.

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, 190504 + ... + 279626.

It is an arithmetic number, because the mean of its divisors is an integer number (2095126992).

Almost surely, 2^20949697995 is an apocalyptic number.

20949697995 is a deficient number, since it is larger than the sum of its proper divisors (12572333877).

20949697995 is a wasteful number, since it uses less digits than its factorization.

20949697995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104802.

The product of its (nonzero) digits is 99202320, while the sum is 69.

The spelling of 20949697995 in words is "twenty billion, nine hundred forty-nine million, six hundred ninety-seven thousand, nine hundred ninety-five".