18002912545 has 4 divisors (see below), whose sum is σ = 21603495060. Its totient is φ = 14402330032.

The previous prime is 18002912539. The next prime is 18002912561. The reversal of 18002912545 is 54521920081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13962021921 + 4040890624 = 118161^2 + 63568^2 .

It is a cyclic number.

It is not a de Polignac number, because 18002912545 - 2²⁹ = 17466041633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800291250 + ... + 1800291259.

It is an arithmetic number, because the mean of its divisors is an integer number (5400873765).

Almost surely, 2^18002912545 is an apocalyptic number.

It is an amenable number.

18002912545 is a deficient number, since it is larger than the sum of its proper divisors (3600582515).

18002912545 is an equidigital number, since it uses as much as digits as its factorization.

18002912545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600582514.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 18002912545 in words is "eighteen billion, two million, nine hundred twelve thousand, five hundred forty-five".