21925195215 has 32 divisors (see below), whose sum is σ = 43736495616. Its totient is φ = 9111768960.

The previous prime is 21925195181. The next prime is 21925195231. The reversal of 21925195215 is 51259152912.

It is not a de Polignac number, because 21925195215 - 2⁷ = 21925195087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9490272 + ... + 9492581.

It is an arithmetic number, because the mean of its divisors is an integer number (1366765488).

Almost surely, 2^21925195215 is an apocalyptic number.

21925195215 is a deficient number, since it is larger than the sum of its proper divisors (21811300401).

21925195215 is a wasteful number, since it uses less digits than its factorization.

21925195215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18982879.

The product of its digits is 81000, while the sum is 42.

The spelling of 21925195215 in words is "twenty-one billion, nine hundred twenty-five million, one hundred ninety-five thousand, two hundred fifteen".