20772923 has 2 divisors, whose sum is σ = 20772924. Its totient is φ = 20772922.

The previous prime is 20772911. The next prime is 20772949. The reversal of 20772923 is 32927702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20772923 - 2⁶ = 20772859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20772923.

It is not a weakly prime, because it can be changed into another prime (20771923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386461 + 10386462.

It is an arithmetic number, because the mean of its divisors is an integer number (10386462).

Almost surely, 2^20772923 is an apocalyptic number.

20772923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20772923 is an equidigital number, since it uses as much as digits as its factorization.

20772923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20772923 is about 4557.7322211819. The cubic root of 20772923 is about 274.8943858902.

The spelling of 20772923 in words is "twenty million, seven hundred seventy-two thousand, nine hundred twenty-three".