20205864903 has 8 divisors (see below), whose sum is σ = 30789889408. Its totient is φ = 11546208504.

The previous prime is 20205864823. The next prime is 20205864929. The reversal of 20205864903 is 30946850202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20205864903 - 2¹⁰ = 20205863879 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 (20205864103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481092001 + ... + 481092042.

It is an arithmetic number, because the mean of its divisors is an integer number (3848736176).

Almost surely, 2^20205864903 is an apocalyptic number.

20205864903 is a deficient number, since it is larger than the sum of its proper divisors (10584024505).

20205864903 is an equidigital number, since it uses as much as digits as its factorization.

20205864903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962184053.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20205864903 in words is "twenty billion, two hundred five million, eight hundred sixty-four thousand, nine hundred three".