20331344 has 40 divisors (see below), whose sum is σ = 43226400. Its totient is φ = 9187200.

The previous prime is 20331329. The next prime is 20331373. The reversal of 20331344 is 44313302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58082 + ... + 58430.

It is an arithmetic number, because the mean of its divisors is an integer number (1080660).

Almost surely, 2^20331344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20331344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21613200).

20331344 is an abundant number, since it is smaller than the sum of its proper divisors (22895056).

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

20331344 is a wasteful number, since it uses less digits than its factorization.

20331344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20331344 is about 4509.0291638001. The cubic root of 20331344 is about 272.9325688718.

Adding to 20331344 its reverse (44313302), we get a palindrome (64644646).

The spelling of 20331344 in words is "twenty million, three hundred thirty-one thousand, three hundred forty-four".