• 10¹⁰⁰⁰⁰ - 22403 is the largest prime with 10000 digits.

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22403 has 4 divisors (see below), whose sum is σ = 22968. Its totient is φ = 21840.

The previous prime is 22397. The next prime is 22409. The reversal of 22403 is 30422.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22397) and next prime (22409).

It is a cyclic number.

It is not a de Polignac number, because 22403 - 2⁸ = 22147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22409) 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, 218 + ... + 303.

It is an arithmetic number, because the mean of its divisors is an integer number (5742).

2²²⁴⁰³ is an apocalyptic number.

22403 is a deficient number, since it is larger than the sum of its proper divisors (565).

22403 is an equidigital number, since it uses as much as digits as its factorization.

22403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 22403 is about 149.6763174320. The cubic root of 22403 is about 28.1904533183.

Adding to 22403 its reverse (30422), we get a palindrome (52825).

The spelling of 22403 in words is "twenty-two thousand, four hundred three", and thus it is an iban number.