21088223610936 has 64 divisors (see below), whose sum is σ = 55106476588800. Its totient is φ = 6712326855168.

The previous prime is 21088223610919. The next prime is 21088223610967. The reversal of 21088223610936 is 63901632288012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32217121 + ... + 32865168.

It is an arithmetic number, because the mean of its divisors is an integer number (861038696700).

Almost surely, 2^{21088223610936} is an apocalyptic number.

It is an amenable number.

21088223610936 is an abundant number, since it is smaller than the sum of its proper divisors (34018252977864).

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

21088223610936 is a wasteful number, since it uses less digits than its factorization.

21088223610936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65082908 (or 65082904 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

Adding to 21088223610936 its reverse (63901632288012), we get a palindrome (84989855898948).

The spelling of 21088223610936 in words is "twenty-one trillion, eighty-eight billion, two hundred twenty-three million, six hundred ten thousand, nine hundred thirty-six".