20744923 has 2 divisors, whose sum is σ = 20744924. Its totient is φ = 20744922.

The previous prime is 20744897. The next prime is 20744929. The reversal of 20744923 is 32944702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20744923 - 2⁵ = 20744891 is a prime.

It is not a weakly prime, because it can be changed into another prime (20744929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10372461 + 10372462.

It is an arithmetic number, because the mean of its divisors is an integer number (10372462).

Almost surely, 2^20744923 is an apocalyptic number.

20744923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20744923 is an equidigital number, since it uses as much as digits as its factorization.

20744923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20744923 is about 4554.6594823324. The cubic root of 20744923 is about 274.7708195261.

The spelling of 20744923 in words is "twenty million, seven hundred forty-four thousand, nine hundred twenty-three".