20704972 has 6 divisors (see below), whose sum is σ = 36233708. Its totient is φ = 10352484.

The previous prime is 20704967. The next prime is 20704987. The reversal of 20704972 is 27940702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2588118 + ... + 2588125.

Almost surely, 2^20704972 is an apocalyptic number.

It is an amenable number.

20704972 is a deficient number, since it is larger than the sum of its proper divisors (15528736).

20704972 is a wasteful number, since it uses less digits than its factorization.

20704972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176247 (or 5176245 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20704972 is about 4550.2716402430. The cubic root of 20704972 is about 274.5943197407.

The spelling of 20704972 in words is "twenty million, seven hundred four thousand, nine hundred seventy-two".