20923896 has 64 divisors (see below), whose sum is σ = 60134400. Its totient is φ = 5943168.

The previous prime is 20923891. The next prime is 20923933. The reversal of 20923896 is 69832902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44961 + ... + 45423.

It is an arithmetic number, because the mean of its divisors is an integer number (939600).

Almost surely, 2^20923896 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 20923896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30067200).

20923896 is an abundant number, since it is smaller than the sum of its proper divisors (39210504).

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

20923896 is a wasteful number, since it uses less digits than its factorization.

20923896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20923896 is about 4574.2645310476. The cubic root of 20923896 is about 275.5587361852.

The spelling of 20923896 in words is "twenty million, nine hundred twenty-three thousand, eight hundred ninety-six".