200019091819 has 4 divisors (see below), whose sum is σ = 208715574096. Its totient is φ = 191322609544.

The previous prime is 200019091787. The next prime is 200019091823. The reversal of 200019091819 is 918190910002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 200019091819 - 2⁵ = 200019091787 is a prime.

It is a super-2 number, since 2×200019091819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200019091619) 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, 4348241104 + ... + 4348241149.

It is an arithmetic number, because the mean of its divisors is an integer number (52178893524).

Almost surely, 2^200019091819 is an apocalyptic number.

200019091819 is a deficient number, since it is larger than the sum of its proper divisors (8696482277).

200019091819 is an equidigital number, since it uses as much as digits as its factorization.

200019091819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696482276.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 200019091819 in words is "two hundred billion, nineteen million, ninety-one thousand, eight hundred nineteen".