18136454427 has 288 divisors, whose sum is σ = 36808611840. Its totient is φ = 8491392000.

The previous prime is 18136454411. The next prime is 18136454459. The reversal of 18136454427 is 72445463181.

18136454427 is a `hidden beast` number, since 1 + 81 + 3 + 6 + 4 + 544 + 27 = 666.

It is not a de Polignac number, because 18136454427 - 2⁴ = 18136454411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18136454227) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 138446152 + ... + 138446282.

It is an arithmetic number, because the mean of its divisors is an integer number (127807680).

Almost surely, 2^18136454427 is an apocalyptic number.

18136454427 is an abundant number, since it is smaller than the sum of its proper divisors (18672157413).

18136454427 is a wasteful number, since it uses less digits than its factorization.

18136454427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 245 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The spelling of 18136454427 in words is "eighteen billion, one hundred thirty-six million, four hundred fifty-four thousand, four hundred twenty-seven".