18053299987 has 4 divisors (see below), whose sum is σ = 18070284400. Its totient is φ = 18036315576.

The previous prime is 18053299981. The next prime is 18053299993. The reversal of 18053299987 is 78999235081.

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 (18053299981) and next prime (18053299993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18053299987 is a prime.

It is a super-2 number, since 2×18053299987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18053299981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8490612 + ... + 8492737.

It is an arithmetic number, because the mean of its divisors is an integer number (4517571100).

Almost surely, 2^18053299987 is an apocalyptic number.

18053299987 is a deficient number, since it is larger than the sum of its proper divisors (16984413).

18053299987 is a wasteful number, since it uses less digits than its factorization.

18053299987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16984412.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 18053299987 in words is "eighteen billion, fifty-three million, two hundred ninety-nine thousand, nine hundred eighty-seven".