20792978 has 8 divisors (see below), whose sum is σ = 31229580. Its totient is φ = 10383120.

The previous prime is 20792963. The next prime is 20792983. The reversal of 20792978 is 87929702.

It can be written as a sum of positive squares in 2 ways, for example, as 19598329 + 1194649 = 4427^2 + 1093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613 + ... + 7928.

Almost surely, 2^20792978 is an apocalyptic number.

20792978 is a deficient number, since it is larger than the sum of its proper divisors (10436602).

20792978 is a wasteful number, since it uses less digits than its factorization.

20792978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13372.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 20792978 is about 4559.9317977356. The cubic root of 20792978 is about 274.9828220675.

The spelling of 20792978 in words is "twenty million, seven hundred ninety-two thousand, nine hundred seventy-eight".