18036408 has 32 divisors (see below), whose sum is σ = 48560400. Its totient is φ = 5549568.

The previous prime is 18036407. The next prime is 18036437. The reversal of 18036408 is 80463081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28593 + ... + 29216.

Almost surely, 2^18036408 is an apocalyptic number.

It is an amenable number.

18036408 is an abundant number, since it is smaller than the sum of its proper divisors (30523992).

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

18036408 is a wasteful number, since it uses less digits than its factorization.

18036408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57831 (or 57827 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18036408 is about 4246.9292435829. The cubic root of 18036408 is about 262.2507166307.

Adding to 18036408 its reverse (80463081), we get a palindrome (98499489).

The spelling of 18036408 in words is "eighteen million, thirty-six thousand, four hundred eight".