18285370589 has 4 divisors (see below), whose sum is σ = 18286901724. Its totient is φ = 18283839456.

The previous prime is 18285370559. The next prime is 18285370619. The reversal of 18285370589 is 98507358281.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (18285370559) and next prime (18285370619).

It can be written as a sum of positive squares in 2 ways, for example, as 299878489 + 17985492100 = 17317^2 + 134110^2 .

It is a cyclic number.

It is not a de Polignac number, because 18285370589 - 2¹² = 18285366493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18285370529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747512 + ... + 771585.

It is an arithmetic number, because the mean of its divisors is an integer number (4571725431).

Almost surely, 2^18285370589 is an apocalyptic number.

It is an amenable number.

18285370589 is a deficient number, since it is larger than the sum of its proper divisors (1531135).

18285370589 is a wasteful number, since it uses less digits than its factorization.

18285370589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531134.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 18285370589 in words is "eighteen billion, two hundred eighty-five million, three hundred seventy thousand, five hundred eighty-nine".