20790472 has 16 divisors (see below), whose sum is σ = 39131100. Its totient is φ = 10355520.

The previous prime is 20790467. The next prime is 20790527. The reversal of 20790472 is 27409702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13205956 + 7584516 = 3634^2 + 2754^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2679 + ... + 6982.

Almost surely, 2^20790472 is an apocalyptic number.

It is an amenable number.

20790472 is a deficient number, since it is larger than the sum of its proper divisors (18340628).

20790472 is a wasteful number, since it uses less digits than its factorization.

20790472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936 (or 9932 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20790472 is about 4559.6570046441. The cubic root of 20790472 is about 274.9717745136.

The spelling of 20790472 in words is "twenty million, seven hundred ninety thousand, four hundred seventy-two".