21300210400 has 72 divisors (see below), whose sum is σ = 59427602640. Its totient is φ = 7302927360.

The previous prime is 21300210311. The next prime is 21300210413. The reversal of 21300210400 is 401200312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1896205 + ... + 1907404.

It is an arithmetic number, because the mean of its divisors is an integer number (825383370).

Almost surely, 2^21300210400 is an apocalyptic number.

21300210400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300210400 is an abundant number, since it is smaller than the sum of its proper divisors (38127392240).

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

21300210400 is a wasteful number, since it uses less digits than its factorization.

21300210400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803636 (or 3803623 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21300210400 its reverse (401200312), we get a palindrome (21701410712).

The spelling of 21300210400 in words is "twenty-one billion, three hundred million, two hundred ten thousand, four hundred".