21313013130 has 24 divisors (see below), whose sum is σ = 55413834372. Its totient is φ = 5683470144.

The previous prime is 21313013069. The next prime is 21313013147. The reversal of 21313013130 is 3131031312.

It is a happy number.

21313013130 is a `hidden beast` number, since 21 + 31 + 301 + 313 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21277765161 + 35247969 = 145869^2 + 5937^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118405539 + ... + 118405718.

Almost surely, 2^21313013130 is an apocalyptic number.

21313013130 is an abundant number, since it is smaller than the sum of its proper divisors (34100821242).

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

21313013130 is a wasteful number, since it uses less digits than its factorization.

21313013130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236811270 (or 236811267 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21313013130 its reverse (3131031312), we get a palindrome (24444044442).

The spelling of 21313013130 in words is "twenty-one billion, three hundred thirteen million, thirteen thousand, one hundred thirty".