18136464 has 20 divisors (see below), whose sum is σ = 46852656. Its totient is φ = 6045472.

The previous prime is 18136463. The next prime is 18136493. The reversal of 18136464 is 46463181.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18136463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188874 + ... + 188969.

Almost surely, 2^18136464 is an apocalyptic number.

It is an amenable number.

18136464 is an abundant number, since it is smaller than the sum of its proper divisors (28716192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18136464 is a wasteful number, since it uses less digits than its factorization.

18136464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377854 (or 377848 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 18136464 is about 4258.6927571733. The cubic root of 18136464 is about 262.7347632228.

The spelling of 18136464 in words is "eighteen million, one hundred thirty-six thousand, four hundred sixty-four".