20606003 has 16 divisors (see below), whose sum is σ = 23294304. Its totient is φ = 18063360.

The previous prime is 20605997. The next prime is 20606009. The reversal of 20606003 is 30060602.

It is an interprime number because it is at equal distance from previous prime (20605997) and next prime (20606009).

It is a cyclic number.

It is not a de Polignac number, because 20606003 - 2⁶ = 20605939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20606009) 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 in 15 ways as a sum of consecutive naturals, for example, 80051 + ... + 80307.

It is an arithmetic number, because the mean of its divisors is an integer number (1455894).

Almost surely, 2^20606003 is an apocalyptic number.

20606003 is a deficient number, since it is larger than the sum of its proper divisors (2688301).

20606003 is a wasteful number, since it uses less digits than its factorization.

20606003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20606003 is about 4539.3835484568. The cubic root of 20606003 is about 274.1561038830.

Adding to 20606003 its reverse (30060602), we get a palindrome (50666605).

The spelling of 20606003 in words is "twenty million, six hundred six thousand, three".