21726236747375 has 8 divisors (see below), whose sum is σ = 27114343460880. Its totient is φ = 17380989397800.

The previous prime is 21726236747323. The next prime is 21726236747399. The reversal of 21726236747375 is 57374763262712.

It is not a de Polignac number, because 21726236747375 - 2¹⁸ = 21726236485231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86904946865 + ... + 86904947114.

It is an arithmetic number, because the mean of its divisors is an integer number (3389292932610).

Almost surely, 2^{21726236747375} is an apocalyptic number.

21726236747375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21726236747375 is a deficient number, since it is larger than the sum of its proper divisors (5388106713505).

21726236747375 is an equidigital number, since it uses as much as digits as its factorization.

21726236747375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173809893994 (or 173809893984 counting only the distinct ones).

The product of its digits is 124467840, while the sum is 62.

The spelling of 21726236747375 in words is "twenty-one trillion, seven hundred twenty-six billion, two hundred thirty-six million, seven hundred forty-seven thousand, three hundred seventy-five".