21375175427734 has 16 divisors (see below), whose sum is σ = 32196224538720. Its totient is φ = 10643101741440.

The previous prime is 21375175427719. The next prime is 21375175427737. The reversal of 21375175427734 is 43772457157312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375175427737) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43462752 + ... + 43951804.

It is an arithmetic number, because the mean of its divisors is an integer number (2012264033670).

Almost surely, 2^{21375175427734} is an apocalyptic number.

21375175427734 is a deficient number, since it is larger than the sum of its proper divisors (10821049110986).

21375175427734 is a wasteful number, since it uses less digits than its factorization.

21375175427734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579975.

The product of its digits is 34574400, while the sum is 58.

The spelling of 21375175427734 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred seventy-five million, four hundred twenty-seven thousand, seven hundred thirty-four".