20713344 has 128 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 6119424.

The previous prime is 20713321. The next prime is 20713369. The reversal of 20713344 is 44331702.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

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, 123949 + ... + 124115.

It is an arithmetic number, because the mean of its divisors is an integer number (481950).

Almost surely, 2^20713344 is an apocalyptic number.

20713344 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 20713344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30844800).

20713344 is an abundant number, since it is smaller than the sum of its proper divisors (40976256).

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

20713344 is a wasteful number, since it uses less digits than its factorization.

20713344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20713344 is about 4551.1914923457. The cubic root of 20713344 is about 274.6313252462.

The spelling of 20713344 in words is "twenty million, seven hundred thirteen thousand, three hundred forty-four".