20397103 has 4 divisors (see below), whose sum is σ = 20782008. Its totient is φ = 20012200.

The previous prime is 20397079. The next prime is 20397137. The reversal of 20397103 is 30179302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30179302 = 2 ⋅15089651.

It is a cyclic number.

It is not a de Polignac number, because 20397103 - 2⁹ = 20396591 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 (20397173) 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, 192373 + ... + 192478.

It is an arithmetic number, because the mean of its divisors is an integer number (5195502).

Almost surely, 2^20397103 is an apocalyptic number.

20397103 is a deficient number, since it is larger than the sum of its proper divisors (384905).

20397103 is an equidigital number, since it uses as much as digits as its factorization.

20397103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384904.

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

The square root of 20397103 is about 4516.3152015775. The cubic root of 20397103 is about 273.2265067706.

The spelling of 20397103 in words is "twenty million, three hundred ninety-seven thousand, one hundred three".