11920503 has 24 divisors (see below), whose sum is σ = 18657408. Its totient is φ = 6631632.

The previous prime is 11920487. The next prime is 11920511. The reversal of 11920503 is 30502911.

It is not a de Polignac number, because 11920503 - 2⁴ = 11920487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 11920503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11920703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38676 + ... + 38982.

It is an arithmetic number, because the mean of its divisors is an integer number (777392).

Almost surely, 2^11920503 is an apocalyptic number.

11920503 is a deficient number, since it is larger than the sum of its proper divisors (6736905).

11920503 is an equidigital number, since it uses as much as digits as its factorization.

11920503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 11920503 is about 3452.6081445771. The cubic root of 11920503 is about 228.4361649288.

The spelling of 11920503 in words is "eleven million, nine hundred twenty thousand, five hundred three".