20903589803 has 4 divisors (see below), whose sum is σ = 22003778760. Its totient is φ = 19803400848.

The previous prime is 20903589779. The next prime is 20903589823. The reversal of 20903589803 is 30898530902.

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 20903589803 - 2²⁰ = 20902541227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20903589823) 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, 550094450 + ... + 550094487.

It is an arithmetic number, because the mean of its divisors is an integer number (5500944690).

Almost surely, 2^20903589803 is an apocalyptic number.

20903589803 is a deficient number, since it is larger than the sum of its proper divisors (1100188957).

20903589803 is a wasteful number, since it uses less digits than its factorization.

20903589803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100188956.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 20903589803 in words is "twenty billion, nine hundred three million, five hundred eighty-nine thousand, eight hundred three".