18618704087 has 4 divisors (see below), whose sum is σ = 18619810440. Its totient is φ = 18617597736.

The previous prime is 18618704081. The next prime is 18618704107. The reversal of 18618704087 is 78040781681.

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

It is a cyclic number.

It is not a de Polignac number, because 18618704087 - 2¹⁰ = 18618703063 is a prime.

It is a super-2 number, since 2×18618704087² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618704081) 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, 527537 + ... + 561722.

It is an arithmetic number, because the mean of its divisors is an integer number (4654952610).

Almost surely, 2^18618704087 is an apocalyptic number.

18618704087 is a deficient number, since it is larger than the sum of its proper divisors (1106353).

18618704087 is a wasteful number, since it uses less digits than its factorization.

18618704087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106352.

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 18618704087 in words is "eighteen billion, six hundred eighteen million, seven hundred four thousand, eighty-seven".