21373735327 has 4 divisors (see below), whose sum is σ = 24427126096. Its totient is φ = 18320344560.

The previous prime is 21373735301. The next prime is 21373735337. The reversal of 21373735327 is 72353737312.

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

It is not a de Polignac number, because 21373735327 - 2²³ = 21365346719 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 (21373735337) 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, 1526695374 + ... + 1526695387.

It is an arithmetic number, because the mean of its divisors is an integer number (6106781524).

Almost surely, 2^21373735327 is an apocalyptic number.

21373735327 is a deficient number, since it is larger than the sum of its proper divisors (3053390769).

21373735327 is an equidigital number, since it uses as much as digits as its factorization.

21373735327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053390768.

The product of its digits is 555660, while the sum is 43.

The spelling of 21373735327 in words is "twenty-one billion, three hundred seventy-three million, seven hundred thirty-five thousand, three hundred twenty-seven".