21130218360 has 64 divisors (see below), whose sum is σ = 70434064800. Its totient is φ = 5634724608.

The previous prime is 21130218341. The next prime is 21130218397. The reversal of 21130218360 is 6381203112.

It is a happy number.

It is a super-2 number, since 2×21130218360² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 9781429 + ... + 9783588.

Almost surely, 2^21130218360 is an apocalyptic number.

21130218360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130218360 is an abundant number, since it is smaller than the sum of its proper divisors (49303846440).

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

21130218360 is a wasteful number, since it uses less digits than its factorization.

21130218360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19565037 (or 19565027 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21130218360 in words is "twenty-one billion, one hundred thirty million, two hundred eighteen thousand, three hundred sixty".