21382168367 has 12 divisors (see below), whose sum is σ = 25342442136. Its totient is φ = 17981767440.

The previous prime is 21382168331. The next prime is 21382168369. The reversal of 21382168367 is 76386128312.

It is not a de Polignac number, because 21382168367 - 2⁶ = 21382168303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21382168369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4114109 + ... + 4119302.

It is an arithmetic number, because the mean of its divisors is an integer number (2111870178).

Almost surely, 2^21382168367 is an apocalyptic number.

21382168367 is a deficient number, since it is larger than the sum of its proper divisors (3960273769).

21382168367 is an equidigital number, since it uses as much as digits as its factorization.

21382168367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233478 (or 8233471 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The spelling of 21382168367 in words is "twenty-one billion, three hundred eighty-two million, one hundred sixty-eight thousand, three hundred sixty-seven".