21104040000 has 280 divisors, whose sum is σ = 70786191168. Its totient is φ = 5546240000.

The previous prime is 21104039977. The next prime is 21104040029. The reversal of 21104040000 is 4040112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8518762 + ... + 8521238.

Almost surely, 2^21104040000 is an apocalyptic number.

21104040000 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 21104040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35393095584).

21104040000 is an abundant number, since it is smaller than the sum of its proper divisors (49682151168).

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

21104040000 is an equidigital number, since it uses as much as digits as its factorization.

21104040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21104040000 its reverse (4040112), we get a palindrome (21108080112).

The spelling of 21104040000 in words is "twenty-one billion, one hundred four million, forty thousand".