18225536 has 32 divisors (see below), whose sum is σ = 41497680. Its totient is φ = 7810560.

The previous prime is 18225523. The next prime is 18225539. The reversal of 18225536 is 63552281.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18225539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9275 + ... + 11066.

Almost surely, 2^18225536 is an apocalyptic number.

18225536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18225536 is an abundant number, since it is smaller than the sum of its proper divisors (23272144).

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

18225536 is an equidigital number, since it uses as much as digits as its factorization.

18225536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20362 (or 20350 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 18225536 is about 4269.1376178334. The cubic root of 18225536 is about 263.1641762880.

The spelling of 18225536 in words is "eighteen million, two hundred twenty-five thousand, five hundred thirty-six".