20970772 has 6 divisors (see below), whose sum is σ = 36698858. Its totient is φ = 10485384.

The previous prime is 20970769. The next prime is 20970797. The reversal of 20970772 is 27707902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17859076 + 3111696 = 4226^2 + 1764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621343 + ... + 2621350.

Almost surely, 2^20970772 is an apocalyptic number.

It is an amenable number.

20970772 is a deficient number, since it is larger than the sum of its proper divisors (15728086).

20970772 is a wasteful number, since it uses less digits than its factorization.

20970772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242697 (or 5242695 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 20970772 is about 4579.3855483023. The cubic root of 20970772 is about 275.7643616451.

The spelling of 20970772 in words is "twenty million, nine hundred seventy thousand, seven hundred seventy-two".