20568172 has 6 divisors (see below), whose sum is σ = 35994308. Its totient is φ = 10284084.

The previous prime is 20568151. The next prime is 20568193. The reversal of 20568172 is 27186502.

It is an interprime number because it is at equal distance from previous prime (20568151) and next prime (20568193).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571018 + ... + 2571025.

Almost surely, 2^20568172 is an apocalyptic number.

It is an amenable number.

20568172 is a deficient number, since it is larger than the sum of its proper divisors (15426136).

20568172 is a wasteful number, since it uses less digits than its factorization.

20568172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142047 (or 5142045 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 20568172 is about 4535.2146586463. The cubic root of 20568172 is about 273.9882247590.

The spelling of 20568172 in words is "twenty million, five hundred sixty-eight thousand, one hundred seventy-two".