21365300632 has 32 divisors (see below), whose sum is σ = 43406178480. Its totient is φ = 9800403840.

The previous prime is 21365300581. The next prime is 21365300653. The reversal of 21365300632 is 23600356312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21365300594 and 21365300603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613219 + ... + 647122.

Almost surely, 2^21365300632 is an apocalyptic number.

It is an amenable number.

21365300632 is an abundant number, since it is smaller than the sum of its proper divisors (22040877848).

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

21365300632 is a wasteful number, since it uses less digits than its factorization.

21365300632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260523 (or 1260519 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 21365300632 its reverse (23600356312), we get a palindrome (44965656944).

The spelling of 21365300632 in words is "twenty-one billion, three hundred sixty-five million, three hundred thousand, six hundred thirty-two".