18063890 has 32 divisors (see below), whose sum is σ = 35211456. Its totient is φ = 6632640.

The previous prime is 18063887. The next prime is 18063907. The reversal of 18063890 is 9836081.

It is a self number, because there is not a number n which added to its sum of digits gives 18063890.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36545 + ... + 37035.

It is an arithmetic number, because the mean of its divisors is an integer number (1100358).

Almost surely, 2^18063890 is an apocalyptic number.

18063890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18063890 is a deficient number, since it is larger than the sum of its proper divisors (17147566).

18063890 is a wasteful number, since it uses less digits than its factorization.

18063890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18063890 is about 4250.1635262658. The cubic root of 18063890 is about 262.3838458136.

The spelling of 18063890 in words is "eighteen million, sixty-three thousand, eight hundred ninety".