18208532 has 12 divisors (see below), whose sum is σ = 32893056. Its totient is φ = 8810520.

The previous prime is 18208499. The next prime is 18208537. The reversal of 18208532 is 23580281.

It is a junction number, because it is equal to n+sod(n) for n = 18208495 and 18208504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18208537) 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, 73298 + ... + 73545.

It is an arithmetic number, because the mean of its divisors is an integer number (2741088).

Almost surely, 2^18208532 is an apocalyptic number.

It is an amenable number.

18208532 is a deficient number, since it is larger than the sum of its proper divisors (14684524).

18208532 is a wasteful number, since it uses less digits than its factorization.

18208532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146878 (or 146876 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18208532 is about 4267.1456501976. The cubic root of 18208532 is about 263.0823088097.

The spelling of 18208532 in words is "eighteen million, two hundred eight thousand, five hundred thirty-two".