20623805203 has 4 divisors (see below), whose sum is σ = 20632849048. Its totient is φ = 20614761360.

The previous prime is 20623805197. The next prime is 20623805207. The reversal of 20623805203 is 30250832602.

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 20623805203 - 2¹³ = 20623797011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20623805207) 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, 4518501 + ... + 4523062.

It is an arithmetic number, because the mean of its divisors is an integer number (5158212262).

Almost surely, 2^20623805203 is an apocalyptic number.

20623805203 is a deficient number, since it is larger than the sum of its proper divisors (9043845).

20623805203 is an equidigital number, since it uses as much as digits as its factorization.

20623805203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043844.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20623805203 in words is "twenty billion, six hundred twenty-three million, eight hundred five thousand, two hundred three".