18287599445 has 4 divisors (see below), whose sum is σ = 21945119340. Its totient is φ = 14630079552.

The previous prime is 18287599439. The next prime is 18287599471. The reversal of 18287599445 is 54499578281.

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 13678004209 + 4609595236 = 116953^2 + 67894^2 .

It is a cyclic number.

It is not a de Polignac number, because 18287599445 - 2⁶ = 18287599381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1828759940 + ... + 1828759949.

It is an arithmetic number, because the mean of its divisors is an integer number (5486279835).

Almost surely, 2^18287599445 is an apocalyptic number.

It is an amenable number.

18287599445 is a deficient number, since it is larger than the sum of its proper divisors (3657519895).

18287599445 is an equidigital number, since it uses as much as digits as its factorization.

18287599445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657519894.

The product of its digits is 29030400, while the sum is 62.

The spelling of 18287599445 in words is "eighteen billion, two hundred eighty-seven million, five hundred ninety-nine thousand, four hundred forty-five".