18643832 has 16 divisors (see below), whose sum is σ = 37013760. Its totient is φ = 8773504.

The previous prime is 18643831. The next prime is 18643837. The reversal of 18643832 is 23834681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18643792 and 18643801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18643831) 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, 68408 + ... + 68679.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^18643832 is an apocalyptic number.

It is an amenable number.

18643832 is a deficient number, since it is larger than the sum of its proper divisors (18369928).

18643832 is a wasteful number, since it uses less digits than its factorization.

18643832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137110 (or 137106 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 18643832 is about 4317.8503911090. The cubic root of 18643832 is about 265.1622691935.

The spelling of 18643832 in words is "eighteen million, six hundred forty-three thousand, eight hundred thirty-two".