20461890803 has 4 divisors (see below), whose sum is σ = 20462191200. Its totient is φ = 20461590408.

The previous prime is 20461890797. The next prime is 20461890811. The reversal of 20461890803 is 30809816402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20461890803 - 2²² = 20457696499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20461890853) 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, 6401 + ... + 202397.

It is an arithmetic number, because the mean of its divisors is an integer number (5115547800).

Almost surely, 2^20461890803 is an apocalyptic number.

20461890803 is a deficient number, since it is larger than the sum of its proper divisors (300397).

20461890803 is a wasteful number, since it uses less digits than its factorization.

20461890803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300396.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 20461890803 in words is "twenty billion, four hundred sixty-one million, eight hundred ninety thousand, eight hundred three".