21959137005 has 16 divisors (see below), whose sum is σ = 37837282560. Its totient is φ = 10810651968.

The previous prime is 21959136889. The next prime is 21959137021. The reversal of 21959137005 is 50073195912.

It is not a de Polignac number, because 21959137005 - 2⁷ = 21959136877 is a prime.

It is a congruent number.

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, 56305285 + ... + 56305674.

It is an arithmetic number, because the mean of its divisors is an integer number (2364830160).

Almost surely, 2^21959137005 is an apocalyptic number.

It is an amenable number.

21959137005 is a deficient number, since it is larger than the sum of its proper divisors (15878145555).

21959137005 is a wasteful number, since it uses less digits than its factorization.

21959137005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112610980.

The product of its (nonzero) digits is 85050, while the sum is 42.

The spelling of 21959137005 in words is "twenty-one billion, nine hundred fifty-nine million, one hundred thirty-seven thousand, five".