21137471324 has 12 divisors (see below), whose sum is σ = 36996970248. Its totient is φ = 10566908400.

The previous prime is 21137471317. The next prime is 21137471357. The reversal of 21137471324 is 42317473112.

It is a congruent number.

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, 430622 + ... + 477189.

It is an arithmetic number, because the mean of its divisors is an integer number (3083080854).

Almost surely, 2^21137471324 is an apocalyptic number.

It is an amenable number.

21137471324 is a deficient number, since it is larger than the sum of its proper divisors (15859498924).

21137471324 is a wasteful number, since it uses less digits than its factorization.

21137471324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913636 (or 913634 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The spelling of 21137471324 in words is "twenty-one billion, one hundred thirty-seven million, four hundred seventy-one thousand, three hundred twenty-four".