21795924937 has 16 divisors (see below), whose sum is σ = 22332186000. Its totient is φ = 21267558400.

The previous prime is 21795924919. The next prime is 21795924949. The reversal of 21795924937 is 73942959712.

It can be written as a sum of positive squares in 8 ways, for example, as 3846356361 + 17949568576 = 62019^2 + 133976^2 .

It is a cyclic number.

It is not a de Polignac number, because 21795924937 - 2¹⁵ = 21795892169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21795924967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2845689 + ... + 2853337.

It is an arithmetic number, because the mean of its divisors is an integer number (1395761625).

Almost surely, 2^21795924937 is an apocalyptic number.

It is an amenable number.

21795924937 is a deficient number, since it is larger than the sum of its proper divisors (536261063).

21795924937 is a wasteful number, since it uses less digits than its factorization.

21795924937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8156.

The product of its digits is 8573040, while the sum is 58.

The spelling of 21795924937 in words is "twenty-one billion, seven hundred ninety-five million, nine hundred twenty-four thousand, nine hundred thirty-seven".