20779952 has 10 divisors (see below), whose sum is σ = 40261188. Its totient is φ = 10389968.

The previous prime is 20779937. The next prime is 20779973. The reversal of 20779952 is 25997702.

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, 649358 + ... + 649389.

Almost surely, 2^20779952 is an apocalyptic number.

It is an amenable number.

20779952 is a deficient number, since it is larger than the sum of its proper divisors (19481236).

20779952 is a wasteful number, since it uses less digits than its factorization.

20779952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298755 (or 1298749 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 20779952 is about 4558.5032631336. The cubic root of 20779952 is about 274.9253880228.

The spelling of 20779952 in words is "twenty million, seven hundred seventy-nine thousand, nine hundred fifty-two".