18039802 has 8 divisors (see below), whose sum is σ = 29519712. Its totient is φ = 8199900.

The previous prime is 18039779. The next prime is 18039803. The reversal of 18039802 is 20893081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18039803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409974 + ... + 410017.

It is an arithmetic number, because the mean of its divisors is an integer number (3689964).

Almost surely, 2^18039802 is an apocalyptic number.

18039802 is a deficient number, since it is larger than the sum of its proper divisors (11479910).

18039802 is a wasteful number, since it uses less digits than its factorization.

18039802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820004.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18039802 is about 4247.3288076154. The cubic root of 18039802 is about 262.2671652700.

The spelling of 18039802 in words is "eighteen million, thirty-nine thousand, eight hundred two".