11253440403 has 20 divisors (see below), whose sum is σ = 17695470760. Its totient is φ = 7107435072.

The previous prime is 11253440383. The next prime is 11253440423. The reversal of 11253440403 is 30404435211.

It is a happy number.

11253440403 is a `hidden beast` number, since 1 + 1 + 253 + 4 + 4 + 0 + 403 = 666.

It is an interprime number because it is at equal distance from previous prime (11253440383) and next prime (11253440423).

It is not a de Polignac number, because 11253440403 - 2⁹ = 11253439891 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 (11253440423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3654550 + ... + 3657627.

It is an arithmetic number, because the mean of its divisors is an integer number (884773538).

Almost surely, 2^11253440403 is an apocalyptic number.

11253440403 is a deficient number, since it is larger than the sum of its proper divisors (6442030357).

11253440403 is an equidigital number, since it uses as much as digits as its factorization.

11253440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312208 (or 7312199 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 11253440403 its reverse (30404435211), we get a palindrome (41657875614).

The spelling of 11253440403 in words is "eleven billion, two hundred fifty-three million, four hundred forty thousand, four hundred three".