20932172 has 6 divisors (see below), whose sum is σ = 36631308. Its totient is φ = 10466084.

The previous prime is 20932169. The next prime is 20932183. The reversal of 20932172 is 27123902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2616518 + ... + 2616525.

It is an arithmetic number, because the mean of its divisors is an integer number (6105218).

Almost surely, 2^20932172 is an apocalyptic number.

It is an amenable number.

20932172 is a deficient number, since it is larger than the sum of its proper divisors (15699136).

20932172 is a wasteful number, since it uses less digits than its factorization.

20932172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233047 (or 5233045 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20932172 is about 4575.1690679143. The cubic root of 20932172 is about 275.5950618532.

The spelling of 20932172 in words is "twenty million, nine hundred thirty-two thousand, one hundred seventy-two".