21331544360 has 48 divisors (see below), whose sum is σ = 55832057460. Its totient is φ = 7313671680.

The previous prime is 21331544317. The next prime is 21331544363. The reversal of 21331544360 is 6344513312.

It can be written as a sum of positive squares in 2 ways, for example, as 21285059236 + 46485124 = 145894^2 + 6818^2 .

It is not an unprimeable number, because it can be changed into a prime (21331544363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5439761 + ... + 5443680.

Almost surely, 2^21331544360 is an apocalyptic number.

21331544360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331544360 is an abundant number, since it is smaller than the sum of its proper divisors (34500513100).

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

21331544360 is a wasteful number, since it uses less digits than its factorization.

21331544360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10883466 (or 10883455 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 21331544360 in words is "twenty-one billion, three hundred thirty-one million, five hundred forty-four thousand, three hundred sixty".