18234036 has 18 divisors (see below), whose sum is σ = 46091682. Its totient is φ = 6078000.

The previous prime is 18234031. The next prime is 18234037. The reversal of 18234036 is 63043281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 86436 = 4260^2 + 294^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253215 + ... + 253286.

It is an arithmetic number, because the mean of its divisors is an integer number (2560649).

Almost surely, 2^18234036 is an apocalyptic number.

It is an amenable number.

18234036 is an abundant number, since it is smaller than the sum of its proper divisors (27857646).

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

18234036 is a wasteful number, since it uses less digits than its factorization.

18234036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506511 (or 506506 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18234036 is about 4270.1330190054. The cubic root of 18234036 is about 263.2050813097.

The spelling of 18234036 in words is "eighteen million, two hundred thirty-four thousand, thirty-six".