20112403 has 2 divisors, whose sum is σ = 20112404. Its totient is φ = 20112402.

The previous prime is 20112401. The next prime is 20112409. The reversal of 20112403 is 30421102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112403 - 2¹ = 20112401 is a prime.

Together with 20112401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20112401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056201 + 10056202.

It is an arithmetic number, because the mean of its divisors is an integer number (10056202).

Almost surely, 2^20112403 is an apocalyptic number.

20112403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112403 is an equidigital number, since it uses as much as digits as its factorization.

20112403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20112403 is about 4484.6853847288. The cubic root of 20112403 is about 271.9493264526.

Adding to 20112403 its reverse (30421102), we get a palindrome (50533505).

The spelling of 20112403 in words is "twenty million, one hundred twelve thousand, four hundred three".