20332320 has 48 divisors (see below), whose sum is σ = 64048320. Its totient is φ = 5421824.

The previous prime is 20332313. The next prime is 20332327. The reversal of 20332320 is 2323302.

It is an interprime number because it is at equal distance from previous prime (20332313) and next prime (20332327).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20332320.

It is not an unprimeable number, because it can be changed into a prime (20332327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20700 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (1334340).

Almost surely, 2^20332320 is an apocalyptic number.

20332320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20332320 is an abundant number, since it is smaller than the sum of its proper divisors (43716000).

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

20332320 is a wasteful number, since it uses less digits than its factorization.

20332320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42377 (or 42369 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 20332320 is about 4509.1373897898. The cubic root of 20332320 is about 272.9369361503.

Adding to 20332320 its reverse (2323302), we get a palindrome (22655622).

It can be divided in two parts, 203 and 32320, that added together give a palindrome (32523).

The spelling of 20332320 in words is "twenty million, three hundred thirty-two thousand, three hundred twenty".