20708972 has 12 divisors (see below), whose sum is σ = 37083816. Its totient is φ = 10113600.

The previous prime is 20708971. The next prime is 20709041. The reversal of 20708972 is 27980702.

It is not an unprimeable number, because it can be changed into a prime (20708971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60029 + ... + 60372.

It is an arithmetic number, because the mean of its divisors is an integer number (3090318).

Almost surely, 2^20708972 is an apocalyptic number.

It is an amenable number.

20708972 is a deficient number, since it is larger than the sum of its proper divisors (16374844).

20708972 is a wasteful number, since it uses less digits than its factorization.

20708972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120448 (or 120446 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 20708972 is about 4550.7111532155. The cubic root of 20708972 is about 274.6120015895.

The spelling of 20708972 in words is "twenty million, seven hundred eight thousand, nine hundred seventy-two".