21650942675 has 6 divisors (see below), whose sum is σ = 26847168948. Its totient is φ = 17320754120.

The previous prime is 21650942627. The next prime is 21650942683. The reversal of 21650942675 is 57624905612.

It is not a de Polignac number, because 21650942675 - 2¹⁶ = 21650877139 is a prime.

It is a super-2 number, since 2×21650942675² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 433018829 + ... + 433018878.

It is an arithmetic number, because the mean of its divisors is an integer number (4474528158).

Almost surely, 2^21650942675 is an apocalyptic number.

21650942675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21650942675 is a deficient number, since it is larger than the sum of its proper divisors (5196226273).

21650942675 is an equidigital number, since it uses as much as digits as its factorization.

21650942675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866037717 (or 866037712 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 21650942675 in words is "twenty-one billion, six hundred fifty million, nine hundred forty-two thousand, six hundred seventy-five".