21343333400 has 48 divisors (see below), whose sum is σ = 52542273240. Its totient is φ = 8035136000.

The previous prime is 21343333399. The next prime is 21343333421. The reversal of 21343333400 is 433334312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21343333400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3135326 + ... + 3142125.

Almost surely, 2^21343333400 is an apocalyptic number.

21343333400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343333400 is an abundant number, since it is smaller than the sum of its proper divisors (31198939840).

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

21343333400 is a wasteful number, since it uses less digits than its factorization.

21343333400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277484 (or 6277475 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 21343333400 its reverse (433334312), we get a palindrome (21776667712).

The spelling of 21343333400 in words is "twenty-one billion, three hundred forty-three million, three hundred thirty-three thousand, four hundred".