20973103 has 4 divisors (see below), whose sum is σ = 20991960. Its totient is φ = 20954248.

The previous prime is 20973089. The next prime is 20973109. The reversal of 20973103 is 30137902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20973103 - 2²¹ = 18875951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20973109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7648 + ... + 10021.

It is an arithmetic number, because the mean of its divisors is an integer number (5247990).

Almost surely, 2^20973103 is an apocalyptic number.

20973103 is a deficient number, since it is larger than the sum of its proper divisors (18857).

20973103 is a wasteful number, since it uses less digits than its factorization.

20973103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18856.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 20973103 is about 4579.6400513577. The cubic root of 20973103 is about 275.7745787687.

The spelling of 20973103 in words is "twenty million, nine hundred seventy-three thousand, one hundred three".