21673245327 has 16 divisors (see below), whose sum is σ = 29118715392. Its totient is φ = 14338376640.

The previous prime is 21673245289. The next prime is 21673245331. The reversal of 21673245327 is 72354237612.

It is not a de Polignac number, because 21673245327 - 2³² = 17378278031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21673245227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1460298 + ... + 1475064.

It is an arithmetic number, because the mean of its divisors is an integer number (1819919712).

Almost surely, 2^21673245327 is an apocalyptic number.

21673245327 is a deficient number, since it is larger than the sum of its proper divisors (7445470065).

21673245327 is a wasteful number, since it uses less digits than its factorization.

21673245327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18478.

The product of its digits is 423360, while the sum is 42.

The spelling of 21673245327 in words is "twenty-one billion, six hundred seventy-three million, two hundred forty-five thousand, three hundred twenty-seven".