21300011460 has 144 divisors (see below), whose sum is σ = 79520103936. Its totient is φ = 4494064896.

The previous prime is 21300011413. The next prime is 21300011461. The reversal of 21300011460 is 6411000312.

It is a happy number.

It is a super-2 number, since 2×21300011460² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (21300011461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 633804 + ... + 666563.

It is an arithmetic number, because the mean of its divisors is an integer number (552222944).

Almost surely, 2^21300011460 is an apocalyptic number.

21300011460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300011460 is an abundant number, since it is smaller than the sum of its proper divisors (58220092476).

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

21300011460 is a wasteful number, since it uses less digits than its factorization.

21300011460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300402 (or 1300397 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21300011460 its reverse (6411000312), we get a palindrome (27711011772).

The spelling of 21300011460 in words is "twenty-one billion, three hundred million, eleven thousand, four hundred sixty".