20320944 has 80 divisors (see below), whose sum is σ = 60496128. Its totient is φ = 5757696.

The previous prime is 20320939. The next prime is 20320961. The reversal of 20320944 is 44902302.

It is a happy number.

It is a super-2 number, since 2×20320944² = 825881530102272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 66039 + ... + 66345.

Almost surely, 2^20320944 is an apocalyptic number.

20320944 is a gapful number since it is divisible by the number (24) 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 20320944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30248064).

20320944 is an abundant number, since it is smaller than the sum of its proper divisors (40175184).

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

20320944 is a wasteful number, since it uses less digits than its factorization.

20320944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20320944 is about 4507.8757746859. The cubic root of 20320944 is about 272.8860236157.

The spelling of 20320944 in words is "twenty million, three hundred twenty thousand, nine hundred forty-four".