20791976 has 16 divisors (see below), whose sum is σ = 39567840. Its totient is φ = 10240560.

The previous prime is 20791973. The next prime is 20791987. The reversal of 20791976 is 67919702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20791973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18860 + ... + 19931.

It is an arithmetic number, because the mean of its divisors is an integer number (2472990).

Almost surely, 2^20791976 is an apocalyptic number.

It is an amenable number.

20791976 is a deficient number, since it is larger than the sum of its proper divisors (18775864).

20791976 is a wasteful number, since it uses less digits than its factorization.

20791976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38864 (or 38860 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 20791976 is about 4559.8219263476. The cubic root of 20791976 is about 274.9784049158.

The spelling of 20791976 in words is "twenty million, seven hundred ninety-one thousand, nine hundred seventy-six".