20131744 has 24 divisors (see below), whose sum is σ = 40309920. Its totient is φ = 9894336.

The previous prime is 20131717. The next prime is 20131753. The reversal of 20131744 is 44713102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3444 + ... + 7219.

It is an arithmetic number, because the mean of its divisors is an integer number (1679580).

Almost surely, 2^20131744 is an apocalyptic number.

It is an amenable number.

20131744 is an abundant number, since it is smaller than the sum of its proper divisors (20178176).

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

20131744 is a wasteful number, since it uses less digits than its factorization.

20131744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10732 (or 10724 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20131744 is about 4486.8412051242. The cubic root of 20131744 is about 272.0364714647.

Adding to 20131744 its reverse (44713102), we get a palindrome (64844846).

The spelling of 20131744 in words is "twenty million, one hundred thirty-one thousand, seven hundred forty-four".