21143303304 has 32 divisors (see below), whose sum is σ = 54087522720. Its totient is φ = 6883865856.

The previous prime is 21143303263. The next prime is 21143303317. The reversal of 21143303304 is 40330334112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10242817 + ... + 10244880.

It is an arithmetic number, because the mean of its divisors is an integer number (1690235085).

Almost surely, 2^21143303304 is an apocalyptic number.

21143303304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21143303304 is an abundant number, since it is smaller than the sum of its proper divisors (32944219416).

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

21143303304 is a wasteful number, since it uses less digits than its factorization.

21143303304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20487749 (or 20487745 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21143303304 its reverse (40330334112), we get a palindrome (61473637416).

The spelling of 21143303304 in words is "twenty-one billion, one hundred forty-three million, three hundred three thousand, three hundred four".