21342034997600 has 72 divisors (see below), whose sum is σ = 52151390534880. Its totient is φ = 8528597291520.

The previous prime is 21342034997593. The next prime is 21342034997623. The reversal of 21342034997600 is 679943024312.

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 12006887 + ... + 13669286.

It is an arithmetic number, because the mean of its divisors is an integer number (724324868540).

Almost surely, 2^{21342034997600} is an apocalyptic number.

21342034997600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342034997600 is an abundant number, since it is smaller than the sum of its proper divisors (30809355537280).

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

21342034997600 is a wasteful number, since it uses less digits than its factorization.

21342034997600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25677232 (or 25677219 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 21342034997600 in words is "twenty-one trillion, three hundred forty-two billion, thirty-four million, nine hundred ninety-seven thousand, six hundred".