21304104045 has 16 divisors (see below), whose sum is σ = 38956076160. Its totient is φ = 9739018944.

The previous prime is 21304104043. The next prime is 21304104061. The reversal of 21304104045 is 54040140312.

It is not a de Polignac number, because 21304104045 - 2¹ = 21304104043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304104043) 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, 101448010 + ... + 101448219.

It is an arithmetic number, because the mean of its divisors is an integer number (2434754760).

Almost surely, 2^21304104045 is an apocalyptic number.

It is an amenable number.

21304104045 is a deficient number, since it is larger than the sum of its proper divisors (17651972115).

21304104045 is a wasteful number, since it uses less digits than its factorization.

21304104045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202896244.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21304104045 its reverse (54040140312), we get a palindrome (75344244357).

The spelling of 21304104045 in words is "twenty-one billion, three hundred four million, one hundred four thousand, forty-five".