18840032 has 24 divisors (see below), whose sum is σ = 37209816. Its totient is φ = 9389952.

The previous prime is 18840023. The next prime is 18840037. The reversal of 18840032 is 23004881.

It is a super-2 number, since 2×18840032² = 709893611522048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18839983 and 18840010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840037) 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, 11963 + ... + 13445.

It is an arithmetic number, because the mean of its divisors is an integer number (1550409).

Almost surely, 2^18840032 is an apocalyptic number.

It is an amenable number.

18840032 is a deficient number, since it is larger than the sum of its proper divisors (18369784).

18840032 is a wasteful number, since it uses less digits than its factorization.

18840032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1882 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18840032 is about 4340.5105690460. The cubic root of 18840032 is about 266.0891780815.

The spelling of 18840032 in words is "eighteen million, eight hundred forty thousand, thirty-two".