21965373275 has 12 divisors (see below), whose sum is σ = 27290589600. Its totient is φ = 17537765280.

The previous prime is 21965373217. The next prime is 21965373319. The reversal of 21965373275 is 57237356912.

It is not a de Polignac number, because 21965373275 - 2⁶ = 21965373211 is a prime.

It is a super-2 number, since 2×21965373275² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 850355 + ... + 875804.

It is an arithmetic number, because the mean of its divisors is an integer number (2274215800).

Almost surely, 2^21965373275 is an apocalyptic number.

21965373275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21965373275 is a deficient number, since it is larger than the sum of its proper divisors (5325216325).

21965373275 is a wasteful number, since it uses less digits than its factorization.

21965373275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726678 (or 1726673 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 50.

The spelling of 21965373275 in words is "twenty-one billion, nine hundred sixty-five million, three hundred seventy-three thousand, two hundred seventy-five".