20939360 has 48 divisors (see below), whose sum is σ = 53279856. Its totient is φ = 7730688.

The previous prime is 20939341. The next prime is 20939383. The reversal of 20939360 is 6393902.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2954 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (1109997).

Almost surely, 2^20939360 is an apocalyptic number.

20939360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20939360 is an abundant number, since it is smaller than the sum of its proper divisors (32340496).

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

20939360 is a wasteful number, since it uses less digits than its factorization.

20939360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095 (or 10087 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 20939360 is about 4575.9545452288. The cubic root of 20939360 is about 275.6266042176.

The spelling of 20939360 in words is "twenty million, nine hundred thirty-nine thousand, three hundred sixty".