21674224385 has 8 divisors (see below), whose sum is σ = 28373530176. Its totient is φ = 15763072240.

The previous prime is 21674224373. The next prime is 21674224423. The reversal of 21674224385 is 58342247612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21674224385 - 2¹² = 21674220289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197038349 + ... + 197038458.

It is an arithmetic number, because the mean of its divisors is an integer number (3546691272).

Almost surely, 2^21674224385 is an apocalyptic number.

It is an amenable number.

21674224385 is a deficient number, since it is larger than the sum of its proper divisors (6699305791).

21674224385 is a wasteful number, since it uses less digits than its factorization.

21674224385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394076823.

The product of its digits is 645120, while the sum is 44.

The spelling of 21674224385 in words is "twenty-one billion, six hundred seventy-four million, two hundred twenty-four thousand, three hundred eighty-five".