21324263371 has 4 divisors (see below), whose sum is σ = 21329642752. Its totient is φ = 21318883992.

The previous prime is 21324263347. The next prime is 21324263393. The reversal of 21324263371 is 17336242312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21324263371 - 2⁵ = 21324263339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21324263321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2683740 + ... + 2691673.

It is an arithmetic number, because the mean of its divisors is an integer number (5332410688).

Almost surely, 2^21324263371 is an apocalyptic number.

21324263371 is a deficient number, since it is larger than the sum of its proper divisors (5379381).

21324263371 is an equidigital number, since it uses as much as digits as its factorization.

21324263371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379380.

The product of its digits is 36288, while the sum is 34.

The spelling of 21324263371 in words is "twenty-one billion, three hundred twenty-four million, two hundred sixty-three thousand, three hundred seventy-one".