21438626234134 has 8 divisors (see below), whose sum is σ = 32158484494920. Its totient is φ = 10719131402496.

The previous prime is 21438626234131. The next prime is 21438626234167. The reversal of 21438626234134 is 43143262683412.

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

It is a super-2 number, since 2×21438626234134² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21438626234131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90709764 + ... + 90945799.

It is an arithmetic number, because the mean of its divisors is an integer number (4019810561865).

Almost surely, 2^{21438626234134} is an apocalyptic number.

21438626234134 is a deficient number, since it is larger than the sum of its proper divisors (10719858260786).

21438626234134 is a wasteful number, since it uses less digits than its factorization.

21438626234134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181714574.

The product of its digits is 3981312, while the sum is 49.

The spelling of 21438626234134 in words is "twenty-one trillion, four hundred thirty-eight billion, six hundred twenty-six million, two hundred thirty-four thousand, one hundred thirty-four".