21024214304 has 24 divisors (see below), whose sum is σ = 41396343408. Its totient is φ = 10510857280.

The previous prime is 21024214297. The next prime is 21024214307. The reversal of 21024214304 is 40341242012.

It is a self number, because there is not a number n which added to its sum of digits gives 21024214304.

It is not an unprimeable number, because it can be changed into a prime (21024214307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272519 + ... + 341049.

It is an arithmetic number, because the mean of its divisors is an integer number (1724847642).

Almost surely, 2^21024214304 is an apocalyptic number.

It is an amenable number.

21024214304 is a deficient number, since it is larger than the sum of its proper divisors (20372129104).

21024214304 is an equidigital number, since it uses as much as digits as its factorization.

21024214304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78128 (or 78120 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21024214304 its reverse (40341242012), we get a palindrome (61365456316).

The spelling of 21024214304 in words is "twenty-one billion, twenty-four million, two hundred fourteen thousand, three hundred four".