18135432 has 48 divisors (see below), whose sum is σ = 56135040. Its totient is φ = 5181408.

The previous prime is 18135427. The next prime is 18135437. The reversal of 18135432 is 23453181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18135427) and next prime (18135437).

It is a junction number, because it is equal to n+sod(n) for n = 18135396 and 18135405.

It is not an unprimeable number, because it can be changed into a prime (18135437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17488 + ... + 18495.

It is an arithmetic number, because the mean of its divisors is an integer number (1169480).

Almost surely, 2^18135432 is an apocalyptic number.

18135432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18135432 is an abundant number, since it is smaller than the sum of its proper divisors (37999608).

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

18135432 is a wasteful number, since it uses less digits than its factorization.

18135432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36002 (or 35995 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 18135432 is about 4258.5715915081. The cubic root of 18135432 is about 262.7297797556.

The spelling of 18135432 in words is "eighteen million, one hundred thirty-five thousand, four hundred thirty-two".