20339320 has 32 divisors (see below), whose sum is σ = 45904320. Its totient is φ = 8110720.

The previous prime is 20339311. The next prime is 20339323. The reversal of 20339320 is 2393302.

It is a junction number, because it is equal to n+sod(n) for n = 20339291 and 20339300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17889 + ... + 18991.

It is an arithmetic number, because the mean of its divisors is an integer number (1434510).

Almost surely, 2^20339320 is an apocalyptic number.

20339320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20339320 is an abundant number, since it is smaller than the sum of its proper divisors (25565000).

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

20339320 is a wasteful number, since it uses less digits than its factorization.

20339320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 20339320 is about 4509.9135246698. The cubic root of 20339320 is about 272.9682547495.

The spelling of 20339320 in words is "twenty million, three hundred thirty-nine thousand, three hundred twenty".