11423020403 has 4 divisors (see below), whose sum is σ = 11919673488. Its totient is φ = 10926367320.

The previous prime is 11423020387. The next prime is 11423020463. The reversal of 11423020403 is 30402032411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30402032411 = 19 ⋅1600106969.

It is a cyclic number.

It is not a de Polignac number, because 11423020403 - 2⁴ = 11423020387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11423020463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248326508 + ... + 248326553.

It is an arithmetic number, because the mean of its divisors is an integer number (2979918372).

Almost surely, 2^11423020403 is an apocalyptic number.

11423020403 is a deficient number, since it is larger than the sum of its proper divisors (496653085).

11423020403 is an equidigital number, since it uses as much as digits as its factorization.

11423020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496653084.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 11423020403 its reverse (30402032411), we get a palindrome (41825052814).

The spelling of 11423020403 in words is "eleven billion, four hundred twenty-three million, twenty thousand, four hundred three".