20101919203 has 16 divisors (see below), whose sum is σ = 20444814720. Its totient is φ = 19762288000.

The previous prime is 20101919191. The next prime is 20101919207. The reversal of 20101919203 is 30291910102.

It is a cyclic number.

It is not a de Polignac number, because 20101919203 - 2⁵ = 20101919171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101919207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18125613 + ... + 18126721.

It is an arithmetic number, because the mean of its divisors is an integer number (1277800920).

Almost surely, 2^20101919203 is an apocalyptic number.

20101919203 is a deficient number, since it is larger than the sum of its proper divisors (342895517).

20101919203 is a wasteful number, since it uses less digits than its factorization.

20101919203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 20101919203 in words is "twenty billion, one hundred one million, nine hundred nineteen thousand, two hundred three".