21772675 has 6 divisors (see below), whose sum is σ = 26998148. Its totient is φ = 17418120.

The previous prime is 21772607. The next prime is 21772691. The reversal of 21772675 is 57627712.

It is not a de Polignac number, because 21772675 - 2²³ = 13384067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435429 + ... + 435478.

Almost surely, 2^21772675 is an apocalyptic number.

21772675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21772675 is a deficient number, since it is larger than the sum of its proper divisors (5225473).

21772675 is an equidigital number, since it uses as much as digits as its factorization.

21772675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870917 (or 870912 counting only the distinct ones).

The product of its digits is 41160, while the sum is 37.

The square root of 21772675 is about 4666.1199084464. The cubic root of 21772675 is about 279.2354781983.

The spelling of 21772675 in words is "twenty-one million, seven hundred seventy-two thousand, six hundred seventy-five".