21219989320264 has 96 divisors (see below), whose sum is σ = 47537678520000. Its totient is φ = 8847860418432.

The previous prime is 21219989320247. The next prime is 21219989320339. The reversal of 21219989320264 is 46202398991212.

It is a happy number.

It is a super-2 number, since 2×21219989320264² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21219989320199 and 21219989320208.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243028887 + ... + 243116185.

It is an arithmetic number, because the mean of its divisors is an integer number (495184151250).

Almost surely, 2^{21219989320264} 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 21219989320264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23768839260000).

21219989320264 is an abundant number, since it is smaller than the sum of its proper divisors (26317689199736).

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

21219989320264 is a wasteful number, since it uses less digits than its factorization.

21219989320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104115 (or 104104 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 21219989320264 in words is "twenty-one trillion, two hundred nineteen billion, nine hundred eighty-nine million, three hundred twenty thousand, two hundred sixty-four".