20727568 has 10 divisors (see below), whose sum is σ = 40159694. Its totient is φ = 10363776.

The previous prime is 20727529. The next prime is 20727587. The reversal of 20727568 is 86572702.

It can be written as a sum of positive squares in only one way, i.e., 20684304 + 43264 = 4548^2 + 208^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647721 + ... + 647752.

Almost surely, 2^20727568 is an apocalyptic number.

It is an amenable number.

20727568 is a deficient number, since it is larger than the sum of its proper divisors (19432126).

20727568 is a wasteful number, since it uses less digits than its factorization.

20727568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295481 (or 1295475 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 20727568 is about 4552.7538918769. The cubic root of 20727568 is about 274.6941746206.

The spelling of 20727568 in words is "twenty million, seven hundred twenty-seven thousand, five hundred sixty-eight".