21136681795248 has 180 divisors, whose sum is σ = 64340091312120. Its totient is φ = 6459426570240.

The previous prime is 21136681795241. The next prime is 21136681795261. The reversal of 21136681795248 is 84259718663112.

It is a happy number.

21136681795248 is a `hidden beast` number, since 2 + 1 + 1 + 36 + 6 + 8 + 1 + 79 + 524 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (21136681795241) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1390161 + ... + 6648752.

It is an arithmetic number, because the mean of its divisors is an integer number (357444951734).

Almost surely, 2^{21136681795248} is an apocalyptic number.

It is an amenable number.

21136681795248 is an abundant number, since it is smaller than the sum of its proper divisors (43203409516872).

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

21136681795248 is a wasteful number, since it uses less digits than its factorization.

21136681795248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039008 (or 8038968 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 21136681795248 in words is "twenty-one trillion, one hundred thirty-six billion, six hundred eighty-one million, seven hundred ninety-five thousand, two hundred forty-eight".