20756972 has 24 divisors (see below), whose sum is σ = 37180416. Its totient is φ = 10137168.

The previous prime is 20756969. The next prime is 20756977. The reversal of 20756972 is 27965702.

It is not an unprimeable number, because it can be changed into a prime (20756977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33893 + ... + 34499.

It is an arithmetic number, because the mean of its divisors is an integer number (1549184).

Almost surely, 2^20756972 is an apocalyptic number.

It is an amenable number.

20756972 is a deficient number, since it is larger than the sum of its proper divisors (16423444).

20756972 is a wasteful number, since it uses less digits than its factorization.

20756972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 20756972 is about 4555.9820017204. The cubic root of 20756972 is about 274.8240064005.

The spelling of 20756972 in words is "twenty million, seven hundred fifty-six thousand, nine hundred seventy-two".