22181638677 has 8 divisors (see below), whose sum is σ = 32264201760. Its totient is φ = 13443417360.

The previous prime is 22181638637. The next prime is 22181638753. The reversal of 22181638677 is 77683618122.

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

It is not a de Polignac number, because 22181638677 - 2¹¹ = 22181636629 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181638637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336085402 + ... + 336085467.

It is an arithmetic number, because the mean of its divisors is an integer number (4033025220).

Almost surely, 2^22181638677 is an apocalyptic number.

It is an amenable number.

22181638677 is a deficient number, since it is larger than the sum of its proper divisors (10082563083).

22181638677 is a wasteful number, since it uses less digits than its factorization.

22181638677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672170883.

The product of its digits is 1354752, while the sum is 51.

The spelling of 22181638677 in words is "twenty-two billion, one hundred eighty-one million, six hundred thirty-eight thousand, six hundred seventy-seven".