20533923 has 12 divisors (see below), whose sum is σ = 29786328. Its totient is φ = 13631040.

The previous prime is 20533897. The next prime is 20533939. The reversal of 20533923 is 32933502.

It is not a de Polignac number, because 20533923 - 2⁶ = 20533859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20533973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2565 + ... + 6902.

It is an arithmetic number, because the mean of its divisors is an integer number (2482194).

Almost surely, 2^20533923 is an apocalyptic number.

20533923 is a deficient number, since it is larger than the sum of its proper divisors (9252405).

20533923 is a wasteful number, since it uses less digits than its factorization.

20533923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714 (or 9711 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 20533923 is about 4531.4371892370. The cubic root of 20533923 is about 273.8360635135.

The spelling of 20533923 in words is "twenty million, five hundred thirty-three thousand, nine hundred twenty-three".