18861430146 has 32 divisors (see below), whose sum is σ = 40944519168. Its totient is φ = 5757816960.

The previous prime is 18861430141. The next prime is 18861430151. The reversal of 18861430146 is 64103416881.

It is an interprime number because it is at equal distance from previous prime (18861430141) and next prime (18861430151).

It is a junction number, because it is equal to n+sod(n) for n = 18861430098 and 18861430107.

It is not an unprimeable number, because it can be changed into a prime (18861430141) 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, 942115 + ... + 961926.

It is an arithmetic number, because the mean of its divisors is an integer number (1279516224).

Almost surely, 2^18861430146 is an apocalyptic number.

18861430146 is an abundant number, since it is smaller than the sum of its proper divisors (22083089022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18861430146 is a wasteful number, since it uses less digits than its factorization.

18861430146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904186.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 18861430146 in words is "eighteen billion, eight hundred sixty-one million, four hundred thirty thousand, one hundred forty-six".