21365031347400 has 192 divisors, whose sum is σ = 71624778220800. Its totient is φ = 5237079644160.

The previous prime is 21365031347381. The next prime is 21365031347437. The reversal of 21365031347400 is 474313056312.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3866149 + ... + 7594548.

It is an arithmetic number, because the mean of its divisors is an integer number (373045719900).

Almost surely, 2^{21365031347400} is an apocalyptic number.

21365031347400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21365031347400 is an abundant number, since it is smaller than the sum of its proper divisors (50259746873400).

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

21365031347400 is a wasteful number, since it uses less digits than its factorization.

21365031347400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460968 (or 11460959 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 21365031347400 in words is "twenty-one trillion, three hundred sixty-five billion, thirty-one million, three hundred forty-seven thousand, four hundred".