21329797148880 has 480 divisors, whose sum is σ = 74458816747392. Its totient is φ = 5044589383680.

The previous prime is 21329797148873. The next prime is 21329797148899. The reversal of 21329797148880 is 8884179792312.

It is a happy number.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1095117702 + ... + 1095137178.

Almost surely, 2^{21329797148880} is an apocalyptic number.

21329797148880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21329797148880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37229408373696).

21329797148880 is an abundant number, since it is smaller than the sum of its proper divisors (53129019598512).

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

21329797148880 is a wasteful number, since it uses less digits than its factorization.

21329797148880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20435 (or 20418 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 69.

The spelling of 21329797148880 in words is "twenty-one trillion, three hundred twenty-nine billion, seven hundred ninety-seven million, one hundred forty-eight thousand, eight hundred eighty".