11820003 has 16 divisors (see below), whose sum is σ = 17068800. Its totient is φ = 7232544.

The previous prime is 11819993. The next prime is 11820019. The reversal of 11820003 is 30002811.

It is a happy number.

It is not a de Polignac number, because 11820003 - 2⁴ = 11819987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11820103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7000 + ... + 8522.

It is an arithmetic number, because the mean of its divisors is an integer number (1066800).

Almost surely, 2^11820003 is an apocalyptic number.

11820003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11820003 is a deficient number, since it is larger than the sum of its proper divisors (5248797).

11820003 is a wasteful number, since it uses less digits than its factorization.

11820003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 11820003 is about 3438.0231238315. The cubic root of 11820003 is about 227.7923817900.

Adding to 11820003 its reverse (30002811), we get a palindrome (41822814).

The spelling of 11820003 in words is "eleven million, eight hundred twenty thousand, three".