18870003 has 10 divisors (see below), whose sum is σ = 28188644. Its totient is φ = 12579948.

The previous prime is 18869957. The next prime is 18870011. The reversal of 18870003 is 30007881.

It is not a de Polignac number, because 18870003 - 2¹⁴ = 18853619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18870013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 116401 + ... + 116562.

Almost surely, 2^18870003 is an apocalyptic number.

18870003 is a deficient number, since it is larger than the sum of its proper divisors (9318641).

18870003 is an equidigital number, since it uses as much as digits as its factorization.

18870003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232975 (or 232966 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18870003 is about 4343.9616711016. The cubic root of 18870003 is about 266.2302028525.

Adding to 18870003 its reverse (30007881), we get a palindrome (48877884).

The spelling of 18870003 in words is "eighteen million, eight hundred seventy thousand, three".