21633265624756 has 12 divisors (see below), whose sum is σ = 37858250616480. Its totient is φ = 10816622591480.

The previous prime is 21633265624753. The next prime is 21633265624771. The reversal of 21633265624756 is 65742656233612.

It is a self number, because there is not a number n which added to its sum of digits gives 21633265624756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21633265624753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4179111 + ... + 7793041.

It is an arithmetic number, because the mean of its divisors is an integer number (3154854218040).

Almost surely, 2^{21633265624756} is an apocalyptic number.

It is an amenable number.

21633265624756 is a deficient number, since it is larger than the sum of its proper divisors (16224984991724).

21633265624756 is a wasteful number, since it uses less digits than its factorization.

21633265624756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110454 (or 5110452 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 58.

The spelling of 21633265624756 in words is "twenty-one trillion, six hundred thirty-three billion, two hundred sixty-five million, six hundred twenty-four thousand, seven hundred fifty-six".