18587094442 has 24 divisors (see below), whose sum is σ = 32448015396. Its totient is φ = 7962107328.

The previous prime is 18587094433. The next prime is 18587094467. The reversal of 18587094442 is 24449078581.

It can be written as a sum of positive squares in 2 ways, for example, as 12864323241 + 5722771201 = 113421^2 + 75649^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18587094442.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166948 + ... + 255040.

Almost surely, 2^18587094442 is an apocalyptic number.

18587094442 is a deficient number, since it is larger than the sum of its proper divisors (13860920954).

18587094442 is a wasteful number, since it uses less digits than its factorization.

18587094442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90262 (or 90255 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 18587094442 in words is "eighteen billion, five hundred eighty-seven million, ninety-four thousand, four hundred forty-two".