21034230400 has 48 divisors (see below), whose sum is σ = 51961130190. Its totient is φ = 8413690880.

The previous prime is 21034230337. The next prime is 21034230403. The reversal of 21034230400 is 403243012.

It can be written as a sum of positive squares in 3 ways, for example, as 11693394496 + 9340835904 = 108136^2 + 96648^2 .

It is not an unprimeable number, because it can be changed into a prime (21034230403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3283399 + ... + 3289798.

Almost surely, 2^21034230400 is an apocalyptic number.

21034230400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21034230400 is an abundant number, since it is smaller than the sum of its proper divisors (30926899790).

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

21034230400 is an equidigital number, since it uses as much as digits as its factorization.

21034230400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573221 (or 6573204 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21034230400 its reverse (403243012), we get a palindrome (21437473412).

The spelling of 21034230400 in words is "twenty-one billion, thirty-four million, two hundred thirty thousand, four hundred".