22158381687 has 16 divisors (see below), whose sum is σ = 31821525120. Its totient is φ = 13634057952.

The previous prime is 22158381667. The next prime is 22158381701. The reversal of 22158381687 is 78618385122.

It is a de Polignac number, because none of the positive numbers 2^k-22158381687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22158381607) 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, 282864 + ... + 352602.

It is an arithmetic number, because the mean of its divisors is an integer number (1988845320).

Almost surely, 2^22158381687 is an apocalyptic number.

22158381687 is a deficient number, since it is larger than the sum of its proper divisors (9663143433).

22158381687 is a wasteful number, since it uses less digits than its factorization.

22158381687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77902.

The product of its digits is 1290240, while the sum is 51.

The spelling of 22158381687 in words is "twenty-two billion, one hundred fifty-eight million, three hundred eighty-one thousand, six hundred eighty-seven".