21726366134 has 8 divisors (see below), whose sum is σ = 35552235528. Its totient is φ = 9875620960.

The previous prime is 21726366133. The next prime is 21726366139. The reversal of 21726366134 is 43166362712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21726366091 and 21726366100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21726366133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493781027 + ... + 493781070.

It is an arithmetic number, because the mean of its divisors is an integer number (4444029441).

Almost surely, 2^21726366134 is an apocalyptic number.

21726366134 is a deficient number, since it is larger than the sum of its proper divisors (13825869394).

21726366134 is a wasteful number, since it uses less digits than its factorization.

21726366134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987562110.

The product of its digits is 217728, while the sum is 41.

The spelling of 21726366134 in words is "twenty-one billion, seven hundred twenty-six million, three hundred sixty-six thousand, one hundred thirty-four".