20892171 has 16 divisors (see below), whose sum is σ = 28894208. Its totient is φ = 13413600.

The previous prime is 20892169. The next prime is 20892173. The reversal of 20892171 is 17129802.

It is an interprime number because it is at equal distance from previous prime (20892169) and next prime (20892173).

It is not a de Polignac number, because 20892171 - 2¹ = 20892169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20892173) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 25356 + ... + 26166.

It is an arithmetic number, because the mean of its divisors is an integer number (1805888).

Almost surely, 2^20892171 is an apocalyptic number.

20892171 is a deficient number, since it is larger than the sum of its proper divisors (8002037).

20892171 is a wasteful number, since it uses less digits than its factorization.

20892171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 20892171 is about 4570.7954449964. The cubic root of 20892171 is about 275.4193975248.

The spelling of 20892171 in words is "twenty million, eight hundred ninety-two thousand, one hundred seventy-one".