21274714349 has 16 divisors (see below), whose sum is σ = 24842029056. Its totient is φ = 17842550400.

The previous prime is 21274714303. The next prime is 21274714399. The reversal of 21274714349 is 94341747212.

It is a cyclic number.

It is not a de Polignac number, because 21274714349 - 2⁸ = 21274714093 is a prime.

It is a super-2 number, since 2×21274714349² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274714399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48872 + ... + 211985.

It is an arithmetic number, because the mean of its divisors is an integer number (1552626816).

Almost surely, 2^21274714349 is an apocalyptic number.

It is an amenable number.

21274714349 is a deficient number, since it is larger than the sum of its proper divisors (3567314707).

21274714349 is a wasteful number, since it uses less digits than its factorization.

21274714349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261116.

The product of its digits is 338688, while the sum is 44.

The spelling of 21274714349 in words is "twenty-one billion, two hundred seventy-four million, seven hundred fourteen thousand, three hundred forty-nine".