20722675 has 24 divisors (see below), whose sum is σ = 26940240. Its totient is φ = 15792000.

The previous prime is 20722661. The next prime is 20722687. The reversal of 20722675 is 57622702.

It is not a de Polignac number, because 20722675 - 2¹⁷ = 20591603 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73084 + ... + 73366.

It is an arithmetic number, because the mean of its divisors is an integer number (1122510).

Almost surely, 2^20722675 is an apocalyptic number.

20722675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20722675 is a deficient number, since it is larger than the sum of its proper divisors (6217565).

20722675 is a wasteful number, since it uses less digits than its factorization.

20722675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20722675 is about 4552.2164930943. The cubic root of 20722675 is about 274.6725579284.

The spelling of 20722675 in words is "twenty million, seven hundred twenty-two thousand, six hundred seventy-five".