21726871294 has 36 divisors (see below), whose sum is σ = 34504173288. Its totient is φ = 10241458920.

The previous prime is 21726871259. The next prime is 21726871297. The reversal of 21726871294 is 49217862712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21726871297) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102970849 + ... + 102971059.

It is an arithmetic number, because the mean of its divisors is an integer number (958449258).

Almost surely, 2^21726871294 is an apocalyptic number.

21726871294 is a deficient number, since it is larger than the sum of its proper divisors (12777301994).

21726871294 is an equidigital number, since it uses as much as digits as its factorization.

21726871294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 339 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The spelling of 21726871294 in words is "twenty-one billion, seven hundred twenty-six million, eight hundred seventy-one thousand, two hundred ninety-four".