21104903088 has 120 divisors (see below), whose sum is σ = 59906433600. Its totient is φ = 6934966272.

The previous prime is 21104903059. The next prime is 21104903101. The reversal of 21104903088 is 88030940112.

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

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, 10567306 + ... + 10569302.

It is an arithmetic number, because the mean of its divisors is an integer number (499220280).

Almost surely, 2^21104903088 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 21104903088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29953216800).

21104903088 is an abundant number, since it is smaller than the sum of its proper divisors (38801530512).

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

21104903088 is a wasteful number, since it uses less digits than its factorization.

21104903088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 21104903088 in words is "twenty-one billion, one hundred four million, nine hundred three thousand, eighty-eight".