21404343300 has 36 divisors (see below), whose sum is σ = 61929900816. Its totient is φ = 5707824800.

The previous prime is 21404343299. The next prime is 21404343313. The reversal of 21404343300 is 334340412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35673606 + ... + 35674205.

Almost surely, 2^21404343300 is an apocalyptic number.

21404343300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21404343300 is an abundant number, since it is smaller than the sum of its proper divisors (40525557516).

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

21404343300 is a wasteful number, since it uses less digits than its factorization.

21404343300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71347828 (or 71347821 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21404343300 its reverse (334340412), we get a palindrome (21738683712).

The spelling of 21404343300 in words is "twenty-one billion, four hundred four million, three hundred forty-three thousand, three hundred".