20704403 has 2 divisors, whose sum is σ = 20704404. Its totient is φ = 20704402.

The previous prime is 20704379. The next prime is 20704417. The reversal of 20704403 is 30440702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20704403 - 2¹⁰ = 20703379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20704603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352201 + 10352202.

It is an arithmetic number, because the mean of its divisors is an integer number (10352202).

Almost surely, 2^20704403 is an apocalyptic number.

20704403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20704403 is an equidigital number, since it uses as much as digits as its factorization.

20704403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20704403 is about 4550.2091160737. The cubic root of 20704403 is about 274.5918043127.

The spelling of 20704403 in words is "twenty million, seven hundred four thousand, four hundred three".