20892923 has 4 divisors (see below), whose sum is σ = 20934480. Its totient is φ = 20851368.

The previous prime is 20892899. The next prime is 20892931. The reversal of 20892923 is 32929802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32929802 = 2 ⋅16464901.

It is a cyclic number.

It is not a de Polignac number, because 20892923 - 2²⁰ = 19844347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20892953) 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, 20015 + ... + 21032.

It is an arithmetic number, because the mean of its divisors is an integer number (5233620).

Almost surely, 2^20892923 is an apocalyptic number.

20892923 is a deficient number, since it is larger than the sum of its proper divisors (41557).

20892923 is an equidigital number, since it uses as much as digits as its factorization.

20892923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41556.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20892923 is about 4570.8777056491. The cubic root of 20892923 is about 275.4227019987.

The spelling of 20892923 in words is "twenty million, eight hundred ninety-two thousand, nine hundred twenty-three".