21214036536536 has 64 divisors (see below), whose sum is σ = 42621836083200. Its totient is φ = 9876030772608.

The previous prime is 21214036536493. The next prime is 21214036536551. The reversal of 21214036536536 is 63563563041212.

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, 7325876 + ... + 9802883.

It is an arithmetic number, because the mean of its divisors is an integer number (665966188800).

Almost surely, 2^{21214036536536} is an apocalyptic number.

It is an amenable number.

21214036536536 is an abundant number, since it is smaller than the sum of its proper divisors (21407799546664).

21214036536536 is a wasteful number, since it uses less digits than its factorization.

21214036536536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17128968 (or 17128964 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 47.

Adding to 21214036536536 its reverse (63563563041212), we get a palindrome (84777599577748).

The spelling of 21214036536536 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, five hundred thirty-six".