21274131326 has 16 divisors (see below), whose sum is σ = 36473385984. Its totient is φ = 9116623224.

The previous prime is 21274131301. The next prime is 21274131349. The reversal of 21274131326 is 62313147212.

It is a junction number, because it is equal to n+sod(n) for n = 21274131292 and 21274131301.

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, 94991 + ... + 227093.

It is an arithmetic number, because the mean of its divisors is an integer number (2279586624).

Almost surely, 2^21274131326 is an apocalyptic number.

21274131326 is a deficient number, since it is larger than the sum of its proper divisors (15199254658).

21274131326 is a wasteful number, since it uses less digits than its factorization.

21274131326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143615.

The product of its digits is 12096, while the sum is 32.

Adding to 21274131326 its reverse (62313147212), we get a palindrome (83587278538).

The spelling of 21274131326 in words is "twenty-one billion, two hundred seventy-four million, one hundred thirty-one thousand, three hundred twenty-six".