18242253987 has 8 divisors (see below), whose sum is σ = 24323923536. Its totient is φ = 12161043552.

The previous prime is 18242253983. The next prime is 18242254007. The reversal of 18242253987 is 78935224281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18242253987 - 2² = 18242253983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18242253983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7828 + ... + 191169.

It is an arithmetic number, because the mean of its divisors is an integer number (3040490442).

Almost surely, 2^18242253987 is an apocalyptic number.

18242253987 is a deficient number, since it is larger than the sum of its proper divisors (6081669549).

18242253987 is a wasteful number, since it uses less digits than its factorization.

18242253987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229557.

The product of its digits is 1935360, while the sum is 51.

The spelling of 18242253987 in words is "eighteen billion, two hundred forty-two million, two hundred fifty-three thousand, nine hundred eighty-seven".