20923008 has 96 divisors (see below), whose sum is σ = 58662240. Its totient is φ = 6606336.

The previous prime is 20923003. The next prime is 20923033. The reversal of 20923008 is 80032902.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20923003) 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, 203085 + ... + 203187.

It is an arithmetic number, because the mean of its divisors is an integer number (611065).

Almost surely, 2^20923008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20923008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29331120).

20923008 is an abundant number, since it is smaller than the sum of its proper divisors (37739232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20923008 is a wasteful number, since it uses less digits than its factorization.

20923008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20923008 is about 4574.1674652334. The cubic root of 20923008 is about 275.5548379370.

The spelling of 20923008 in words is "twenty million, nine hundred twenty-three thousand, eight".