20313744 has 80 divisors (see below), whose sum is σ = 58091520. Its totient is φ = 6065280.

The previous prime is 20313743. The next prime is 20313749. The reversal of 20313744 is 44731302.

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

It is not an unprimeable number, because it can be changed into a prime (20313743) 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 15 ways as a sum of consecutive naturals, for example, 41469 + ... + 41955.

It is an arithmetic number, because the mean of its divisors is an integer number (726144).

Almost surely, 2^20313744 is an apocalyptic number.

20313744 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 20313744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29045760).

20313744 is an abundant number, since it is smaller than the sum of its proper divisors (37777776).

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

20313744 is a wasteful number, since it uses less digits than its factorization.

20313744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 582 counting only the distinct ones).

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

The square root of 20313744 is about 4507.0771016258. The cubic root of 20313744 is about 272.8537906731.

It can be divided in two parts, 2031 and 3744, that added together give a palindrome (5775).

The spelling of 20313744 in words is "twenty million, three hundred thirteen thousand, seven hundred forty-four".