21790072797696 has 480 divisors, whose sum is σ = 75257417883648. Its totient is φ = 6165265674240.

The previous prime is 21790072797671. The next prime is 21790072797707. The reversal of 21790072797696 is 69679727009712.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89582481 + ... + 89825391.

Almost surely, 2^{21790072797696} 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 21790072797696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37628708941824).

21790072797696 is an abundant number, since it is smaller than the sum of its proper divisors (53467345085952).

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

21790072797696 is an equidigital number, since it uses as much as digits as its factorization.

21790072797696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243054 (or 243026 counting only the distinct ones).

The product of its (nonzero) digits is 252047376, while the sum is 72.

The spelling of 21790072797696 in words is "twenty-one trillion, seven hundred ninety billion, seventy-two million, seven hundred ninety-seven thousand, six hundred ninety-six".