20925171 has 12 divisors (see below), whose sum is σ = 30520048. Its totient is φ = 13814064.

The previous prime is 20925169. The next prime is 20925173. The reversal of 20925171 is 17152902.

It is an interprime number because it is at equal distance from previous prime (20925169) and next prime (20925173).

It is not a de Polignac number, because 20925171 - 2¹ = 20925169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10360 + ... + 12213.

Almost surely, 2^20925171 is an apocalyptic number.

20925171 is a deficient number, since it is larger than the sum of its proper divisors (9594877).

20925171 is a wasteful number, since it uses less digits than its factorization.

20925171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22682 (or 22679 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 20925171 is about 4574.4038955912. The cubic root of 20925171 is about 275.5643331392.

The spelling of 20925171 in words is "twenty million, nine hundred twenty-five thousand, one hundred seventy-one".