18285581914 has 4 divisors (see below), whose sum is σ = 27428372874. Its totient is φ = 9142790956.

The previous prime is 18285581869. The next prime is 18285581947. The reversal of 18285581914 is 41918558281.

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

It can be written as a sum of positive squares in only one way, i.e., 15417443889 + 2868138025 = 124167^2 + 53555^2 .

It is a super-3 number, since 3×18285581914³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571395477 + ... + 4571395480.

Almost surely, 2^18285581914 is an apocalyptic number.

18285581914 is a deficient number, since it is larger than the sum of its proper divisors (9142790960).

18285581914 is an equidigital number, since it uses as much as digits as its factorization.

18285581914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142790959.

The product of its digits is 921600, while the sum is 52.

The spelling of 18285581914 in words is "eighteen billion, two hundred eighty-five million, five hundred eighty-one thousand, nine hundred fourteen".