20531031244 has 48 divisors (see below), whose sum is σ = 37639728000. Its totient is φ = 9790666496.

The previous prime is 20531031221. The next prime is 20531031251. The reversal of 20531031244 is 44213013502.

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, 1477722 + ... + 1491550.

It is an arithmetic number, because the mean of its divisors is an integer number (784161000).

Almost surely, 2^20531031244 is an apocalyptic number.

It is an amenable number.

20531031244 is a deficient number, since it is larger than the sum of its proper divisors (17108696756).

20531031244 is a wasteful number, since it uses less digits than its factorization.

20531031244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082 (or 14080 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20531031244 its reverse (44213013502), we get a palindrome (64744044746).

The spelling of 20531031244 in words is "twenty billion, five hundred thirty-one million, thirty-one thousand, two hundred forty-four".