21492310726 has 16 divisors (see below), whose sum is σ = 33299804160. Its totient is φ = 10392821640.

The previous prime is 21492310709. The next prime is 21492310751. The reversal of 21492310726 is 62701329412.

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, 13456 + ... + 207763.

It is an arithmetic number, because the mean of its divisors is an integer number (2081237760).

Almost surely, 2^21492310726 is an apocalyptic number.

21492310726 is a deficient number, since it is larger than the sum of its proper divisors (11807493434).

21492310726 is a wasteful number, since it uses less digits than its factorization.

21492310726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222819.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 21492310726 in words is "twenty-one billion, four hundred ninety-two million, three hundred ten thousand, seven hundred twenty-six".