22455400187 has 16 divisors (see below), whose sum is σ = 25324962432. Its totient is φ = 19733656320.

The previous prime is 22455400169. The next prime is 22455400199. The reversal of 22455400187 is 78100455422.

It is a de Polignac number, because none of the positive numbers 2^k-22455400187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22455400187.

It is not an unprimeable number, because it can be changed into a prime (22455400127) 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, 198833 + ... + 290594.

It is an arithmetic number, because the mean of its divisors is an integer number (1582810152).

Almost surely, 2^22455400187 is an apocalyptic number.

22455400187 is a deficient number, since it is larger than the sum of its proper divisors (2869562245).

22455400187 is a wasteful number, since it uses less digits than its factorization.

22455400187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489578.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 22455400187 in words is "twenty-two billion, four hundred fifty-five million, four hundred thousand, one hundred eighty-seven".