20416603 has 2 divisors, whose sum is σ = 20416604. Its totient is φ = 20416602.

The previous prime is 20416597. The next prime is 20416661. The reversal of 20416603 is 30661402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20416603 - 2¹³ = 20408411 is a prime.

It is equal to p_1295311 and since 20416603 and 1295311 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20416703) 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, 10208301 + 10208302.

It is an arithmetic number, because the mean of its divisors is an integer number (10208302).

Almost surely, 2^20416603 is an apocalyptic number.

20416603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20416603 is an equidigital number, since it uses as much as digits as its factorization.

20416603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20416603 is about 4518.4735254287. The cubic root of 20416603 is about 273.3135488687.

It can be divided in two parts, 204 and 16603, that added together give a 5-th power (16807 = 7⁵).

The spelling of 20416603 in words is "twenty million, four hundred sixteen thousand, six hundred three".