2091900019 has 8 divisors (see below), whose sum is σ = 2402182080. Its totient is φ = 1801636200.

The previous prime is 2091900001. The next prime is 2091900029. The reversal of 2091900019 is 9100091902.

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

It is a cyclic number.

It is not a de Polignac number, because 2091900019 - 2¹⁵ = 2091867251 is a prime.

It is a super-2 number, since 2×2091900019² = 8752091378984400722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091900029) 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, 5004337 + ... + 5004754.

It is an arithmetic number, because the mean of its divisors is an integer number (300272760).

Almost surely, 2^2091900019 is an apocalyptic number.

2091900019 is a deficient number, since it is larger than the sum of its proper divisors (310282061).

2091900019 is a wasteful number, since it uses less digits than its factorization.

2091900019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009121.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 2091900019 is about 45737.2935250874. The cubic root of 2091900019 is about 1278.9305885095.

The spelling of 2091900019 in words is "two billion, ninety-one million, nine hundred thousand, nineteen".