18086951487 has 16 divisors (see below), whose sum is σ = 26641313280. Its totient is φ = 10823030400.

The previous prime is 18086951473. The next prime is 18086951537. The reversal of 18086951487 is 78415968081.

It is not a de Polignac number, because 18086951487 - 2²⁸ = 17818516031 is a prime.

It is a super-2 number, since 2×18086951487² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086951887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466314 + ... + 3471527.

It is an arithmetic number, because the mean of its divisors is an integer number (1665082080).

Almost surely, 2^18086951487 is an apocalyptic number.

18086951487 is a deficient number, since it is larger than the sum of its proper divisors (8554361793).

18086951487 is a wasteful number, since it uses less digits than its factorization.

18086951487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937934.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 18086951487 in words is "eighteen billion, eighty-six million, nine hundred fifty-one thousand, four hundred eighty-seven".