20831240744 has 16 divisors (see below), whose sum is σ = 39060248820. Its totient is φ = 10415174400.

The previous prime is 20831240711. The next prime is 20831240753. The reversal of 20831240744 is 44704213802.

It can be written as a sum of positive squares in 2 ways, for example, as 19474202500 + 1357038244 = 139550^2 + 36838^2 .

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, 227312 + ... + 305504.

Almost surely, 2^20831240744 is an apocalyptic number.

It is an amenable number.

20831240744 is a deficient number, since it is larger than the sum of its proper divisors (18229008076).

20831240744 is a wasteful number, since it uses less digits than its factorization.

20831240744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111500 (or 111496 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The spelling of 20831240744 in words is "twenty billion, eight hundred thirty-one million, two hundred forty thousand, seven hundred forty-four".