18026436 has 12 divisors (see below), whose sum is σ = 42061712. Its totient is φ = 6008808.

The previous prime is 18026423. The next prime is 18026453. The reversal of 18026436 is 63462081.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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, 751090 + ... + 751113.

Almost surely, 2^18026436 is an apocalyptic number.

It is an amenable number.

18026436 is an abundant number, since it is smaller than the sum of its proper divisors (24035276).

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

18026436 is a wasteful number, since it uses less digits than its factorization.

18026436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502210 (or 1502208 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 18026436 is about 4245.7550565241. The cubic root of 18026436 is about 262.2023765131.

It can be divided in two parts, 180264 and 36, that added together give a triangular number (180300 = T₆₀₀).

The spelling of 18026436 in words is "eighteen million, twenty-six thousand, four hundred thirty-six".