21636014361696 has 1200 divisors, whose sum is σ = 79333868496960. Its totient is φ = 5766843962880.

The previous prime is 21636014361691. The next prime is 21636014361761. The reversal of 21636014361696 is 69616341063612.

It is a happy number.

21636014361696 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 6 + 0 + 14 + 3 + 616 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21636014361691) by changing a digit.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 7922376651 + ... + 7922379381.

Almost surely, 2^{21636014361696} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21636014361696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39666934248480).

21636014361696 is an abundant number, since it is smaller than the sum of its proper divisors (57697854135264).

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

21636014361696 is an equidigital number, since it uses as much as digits as its factorization.

21636014361696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 21636014361696 in words is "twenty-one trillion, six hundred thirty-six billion, fourteen million, three hundred sixty-one thousand, six hundred ninety-six".