21322130364 has 24 divisors (see below), whose sum is σ = 55279597520. Its totient is φ = 7107376752.

The previous prime is 21322130363. The next prime is 21322130387. The reversal of 21322130364 is 46303122312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322130363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98713459 + ... + 98713674.

Almost surely, 2^21322130364 is an apocalyptic number.

It is an amenable number.

21322130364 is an abundant number, since it is smaller than the sum of its proper divisors (33957467156).

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

21322130364 is a wasteful number, since it uses less digits than its factorization.

21322130364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197427146 (or 197427138 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21322130364 its reverse (46303122312), we get a palindrome (67625252676).

The spelling of 21322130364 in words is "twenty-one billion, three hundred twenty-two million, one hundred thirty thousand, three hundred sixty-four".