21140401304 has 64 divisors (see below), whose sum is σ = 44735755680. Its totient is φ = 9281920000.

The previous prime is 21140401297. The next prime is 21140401307. The reversal of 21140401304 is 40310404112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140401307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335402 + ... + 393414.

Almost surely, 2^21140401304 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 21140401304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22367877840).

21140401304 is an abundant number, since it is smaller than the sum of its proper divisors (23595354376).

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

21140401304 is a wasteful number, since it uses less digits than its factorization.

21140401304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58172 (or 58168 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21140401304 its reverse (40310404112), we get a palindrome (61450805416).

The spelling of 21140401304 in words is "twenty-one billion, one hundred forty million, four hundred one thousand, three hundred four".