21302343136 has 48 divisors (see below), whose sum is σ = 46336709664. Its totient is φ = 9588772864.

The previous prime is 21302343131. The next prime is 21302343157. The reversal of 21302343136 is 63134320312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302343131) 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, 838765 + ... + 863788.

It is an arithmetic number, because the mean of its divisors is an integer number (965348118).

Almost surely, 2^21302343136 is an apocalyptic number.

It is an amenable number.

21302343136 is an abundant number, since it is smaller than the sum of its proper divisors (25034366528).

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

21302343136 is a wasteful number, since it uses less digits than its factorization.

21302343136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702603 (or 1702595 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21302343136 its reverse (63134320312), we get a palindrome (84436663448).

The spelling of 21302343136 in words is "twenty-one billion, three hundred two million, three hundred forty-three thousand, one hundred thirty-six".