21613430360 has 64 divisors (see below), whose sum is σ = 49168814400. Its totient is φ = 8549824000.

The previous prime is 21613430347. The next prime is 21613430381. The reversal of 21613430360 is 6303431612.

It is a congruent number.

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, 4162646 + ... + 4167834.

It is an arithmetic number, because the mean of its divisors is an integer number (768262725).

Almost surely, 2^21613430360 is an apocalyptic number.

21613430360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21613430360 is an abundant number, since it is smaller than the sum of its proper divisors (27555384040).

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

21613430360 is a wasteful number, since it uses less digits than its factorization.

21613430360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332 (or 6328 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21613430360 its reverse (6303431612), we get a palindrome (27916861972).

The spelling of 21613430360 in words is "twenty-one billion, six hundred thirteen million, four hundred thirty thousand, three hundred sixty".