20790986 has 8 divisors (see below), whose sum is σ = 31345380. Its totient is φ = 10342528.

The previous prime is 20790947. The next prime is 20791007. The reversal of 20790986 is 68909702.

It can be written as a sum of positive squares in 2 ways, for example, as 19971961 + 819025 = 4469^2 + 905^2 .

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, 25991 + ... + 26778.

Almost surely, 2^20790986 is an apocalyptic number.

20790986 is a deficient number, since it is larger than the sum of its proper divisors (10554394).

20790986 is a wasteful number, since it uses less digits than its factorization.

20790986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52968.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 20790986 is about 4559.7133681845. The cubic root of 20790986 is about 274.9740405248.

The spelling of 20790986 in words is "twenty million, seven hundred ninety thousand, nine hundred eighty-six".