20892973 has 2 divisors, whose sum is σ = 20892974. Its totient is φ = 20892972.

The previous prime is 20892953. The next prime is 20892979. The reversal of 20892973 is 37929802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 660969 = 4498^2 + 813^2 .

It is a cyclic number.

It is not a de Polignac number, because 20892973 - 2¹⁷ = 20761901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20892979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446486 + 10446487.

It is an arithmetic number, because the mean of its divisors is an integer number (10446487).

Almost surely, 2^20892973 is an apocalyptic number.

It is an amenable number.

20892973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20892973 is an equidigital number, since it uses as much as digits as its factorization.

20892973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20892973 is about 4570.8831750549. The cubic root of 20892973 is about 275.4229217083.

The spelling of 20892973 in words is "twenty million, eight hundred ninety-two thousand, nine hundred seventy-three".