21674938311 has 24 divisors (see below), whose sum is σ = 34965337680. Its totient is φ = 13338421632.

The previous prime is 21674938309. The next prime is 21674938333. The reversal of 21674938311 is 11383947612.

21674938311 is a `hidden beast` number, since 21 + 67 + 493 + 83 + 1 + 1 = 666.

It is not a de Polignac number, because 21674938311 - 2¹ = 21674938309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674938301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3427506 + ... + 3433823.

It is an arithmetic number, because the mean of its divisors is an integer number (1456889070).

Almost surely, 2^21674938311 is an apocalyptic number.

21674938311 is a deficient number, since it is larger than the sum of its proper divisors (13290399369).

21674938311 is an equidigital number, since it uses as much as digits as its factorization.

21674938311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861357 (or 6861345 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 21674938311 in words is "twenty-one billion, six hundred seventy-four million, nine hundred thirty-eight thousand, three hundred eleven".