21354125326 has 4 divisors (see below), whose sum is σ = 32031187992. Its totient is φ = 10677062662.

The previous prime is 21354125297. The next prime is 21354125329. The reversal of 21354125326 is 62352145312.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21354125291 and 21354125300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354125329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5338531330 + ... + 5338531333.

It is an arithmetic number, because the mean of its divisors is an integer number (8007796998).

Almost surely, 2^21354125326 is an apocalyptic number.

21354125326 is a deficient number, since it is larger than the sum of its proper divisors (10677062666).

21354125326 is a wasteful number, since it uses less digits than its factorization.

21354125326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677062665.

The product of its digits is 43200, while the sum is 34.

The spelling of 21354125326 in words is "twenty-one billion, three hundred fifty-four million, one hundred twenty-five thousand, three hundred twenty-six".