20906372 has 12 divisors (see below), whose sum is σ = 37027536. Its totient is φ = 10327080.

The previous prime is 20906371. The next prime is 20906377. The reversal of 20906372 is 27360902.

It is not an unprimeable number, because it can be changed into a prime (20906371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31154 + ... + 31817.

It is an arithmetic number, because the mean of its divisors is an integer number (3085628).

Almost surely, 2^20906372 is an apocalyptic number.

It is an amenable number.

20906372 is a deficient number, since it is larger than the sum of its proper divisors (16121164).

20906372 is a wasteful number, since it uses less digits than its factorization.

20906372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63058 (or 63056 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20906372 is about 4572.3486306274. The cubic root of 20906372 is about 275.4817868445.

The spelling of 20906372 in words is "twenty million, nine hundred six thousand, three hundred seventy-two".