18545532 has 12 divisors (see below), whose sum is σ = 43272936. Its totient is φ = 6181840.

The previous prime is 18545531. The next prime is 18545537. The reversal of 18545532 is 23554581.

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

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18545493 and 18545502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18545531) 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, 772719 + ... + 772742.

It is an arithmetic number, because the mean of its divisors is an integer number (3606078).

Almost surely, 2^18545532 is an apocalyptic number.

18545532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18545532 is an abundant number, since it is smaller than the sum of its proper divisors (24727404).

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

18545532 is a wasteful number, since it uses less digits than its factorization.

18545532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545468 (or 1545466 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 18545532 is about 4306.4523682493. The cubic root of 18545532 is about 264.6954231801.

The spelling of 18545532 in words is "eighteen million, five hundred forty-five thousand, five hundred thirty-two".