21274742113 has 8 divisors (see below), whose sum is σ = 22107052800. Its totient is φ = 20449011408.

The previous prime is 21274742077. The next prime is 21274742117. The reversal of 21274742113 is 31124747212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21274742113 is a prime.

It is a super-2 number, since 2×21274742113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21274742117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638403 + ... + 1651336.

It is an arithmetic number, because the mean of its divisors is an integer number (2763381600).

Almost surely, 2^21274742113 is an apocalyptic number.

It is an amenable number.

21274742113 is a deficient number, since it is larger than the sum of its proper divisors (832310687).

21274742113 is a wasteful number, since it uses less digits than its factorization.

21274742113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289991.

The product of its digits is 18816, while the sum is 34.

The spelling of 21274742113 in words is "twenty-one billion, two hundred seventy-four million, seven hundred forty-two thousand, one hundred thirteen".