21042224304 has 40 divisors (see below), whose sum is σ = 55103733552. Its totient is φ = 6917990400.

The previous prime is 21042224297. The next prime is 21042224309. The reversal of 21042224304 is 40342224012.

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

It is not an unprimeable number, because it can be changed into a prime (21042224309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2999097 + ... + 3006104.

Almost surely, 2^21042224304 is an apocalyptic number.

21042224304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21042224304 is an abundant number, since it is smaller than the sum of its proper divisors (34061509248).

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

21042224304 is a wasteful number, since it uses less digits than its factorization.

21042224304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005285 (or 6005279 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21042224304 its reverse (40342224012), we get a palindrome (61384448316).

The spelling of 21042224304 in words is "twenty-one billion, forty-two million, two hundred twenty-four thousand, three hundred four".