20248403 has 4 divisors (see below), whose sum is σ = 23141040. Its totient is φ = 17355768.

The previous prime is 20248381. The next prime is 20248427. The reversal of 20248403 is 30484202.

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

It is a cyclic number.

It is not a de Polignac number, because 20248403 - 2⁸ = 20248147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20248103) 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, 1446308 + ... + 1446321.

It is an arithmetic number, because the mean of its divisors is an integer number (5785260).

Almost surely, 2^20248403 is an apocalyptic number.

20248403 is a deficient number, since it is larger than the sum of its proper divisors (2892637).

20248403 is an equidigital number, since it uses as much as digits as its factorization.

20248403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892636.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 20248403 is about 4499.8225520569. The cubic root of 20248403 is about 272.5609234486.

The spelling of 20248403 in words is "twenty million, two hundred forty-eight thousand, four hundred three".