21320048880 has 400 divisors, whose sum is σ = 80086790784. Its totient is φ = 5225472000.

The previous prime is 21320048863. The next prime is 21320048917. The reversal of 21320048880 is 8884002312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 28388505 + ... + 28389255.

Almost surely, 2^21320048880 is an apocalyptic number.

21320048880 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 21320048880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40043395392).

21320048880 is an abundant number, since it is smaller than the sum of its proper divisors (58766741904).

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

21320048880 is a wasteful number, since it uses less digits than its factorization.

21320048880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 21320048880 in words is "twenty-one billion, three hundred twenty million, forty-eight thousand, eight hundred eighty".