20383520 has 96 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 7490560.

The previous prime is 20383513. The next prime is 20383537. The reversal of 20383520 is 2538302.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106625 + ... + 106815.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^20383520 is an apocalyptic number.

20383520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20383520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127360).

20383520 is an abundant number, since it is smaller than the sum of its proper divisors (31871200).

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

20383520 is a wasteful number, since it uses less digits than its factorization.

20383520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20383520 is about 4514.8111809909. The cubic root of 20383520 is about 273.1658435848.

The spelling of 20383520 in words is "twenty million, three hundred eighty-three thousand, five hundred twenty".