20040403 has 2 divisors, whose sum is σ = 20040404. Its totient is φ = 20040402.

The previous prime is 20040373. The next prime is 20040409. The reversal of 20040403 is 30404002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20040403 - 2⁹ = 20039891 is a prime.

It is not a weakly prime, because it can be changed into another prime (20040409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020201 + 10020202.

It is an arithmetic number, because the mean of its divisors is an integer number (10020202).

Almost surely, 2^20040403 is an apocalyptic number.

20040403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040403 is an equidigital number, since it uses as much as digits as its factorization.

20040403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20040403 is about 4476.6508686740. The cubic root of 20040403 is about 271.6244230718.

Adding to 20040403 its reverse (30404002), we get a palindrome (50444405).

The spelling of 20040403 in words is "twenty million, forty thousand, four hundred three".