20973790 has 16 divisors (see below), whose sum is σ = 37860768. Its totient is φ = 8365536.

The previous prime is 20973779. The next prime is 20973791. The reversal of 20973790 is 9737902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20973791) 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, 919 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (2366298).

Almost surely, 2^20973790 is an apocalyptic number.

20973790 is a deficient number, since it is larger than the sum of its proper divisors (16886978).

20973790 is a wasteful number, since it uses less digits than its factorization.

20973790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6003.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20973790 is about 4579.7150566383. The cubic root of 20973790 is about 275.7775898486. Note that the first 3 decimals are identical.

The spelling of 20973790 in words is "twenty million, nine hundred seventy-three thousand, seven hundred ninety".