18061803 has 12 divisors (see below), whose sum is σ = 27624168. Its totient is φ = 11332800.

The previous prime is 18061759. The next prime is 18061819. The reversal of 18061803 is 30816081.

It is not a de Polignac number, because 18061803 - 2¹⁸ = 17799659 is a prime.

It is a super-2 number, since 2×18061803² = 652457455221618, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18061873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58873 + ... + 59178.

It is an arithmetic number, because the mean of its divisors is an integer number (2302014).

Almost surely, 2^18061803 is an apocalyptic number.

18061803 is a deficient number, since it is larger than the sum of its proper divisors (9562365).

18061803 is a wasteful number, since it uses less digits than its factorization.

18061803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118074 (or 118071 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18061803 is about 4249.9179992089. The cubic root of 18061803 is about 262.3737406410.

Adding to 18061803 its reverse (30816081), we get a palindrome (48877884).

The spelling of 18061803 in words is "eighteen million, sixty-one thousand, eight hundred three".