1900019190919 has 4 divisors (see below), whose sum is σ = 1902661777440. Its totient is φ = 1897376604400.

The previous prime is 1900019190791. The next prime is 1900019190983. The reversal of 1900019190919 is 9190919100091.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1900019190919 - 2⁷ = 1900019190791 is a prime.

It is a super-2 number, since 2×1900019190919² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900019199919) 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, 1321292182 + ... + 1321293619.

It is an arithmetic number, because the mean of its divisors is an integer number (475665444360).

Almost surely, 2^{1900019190919} is an apocalyptic number.

1900019190919 is a deficient number, since it is larger than the sum of its proper divisors (2642586521).

1900019190919 is an equidigital number, since it uses as much as digits as its factorization.

1900019190919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642586520.

The product of its (nonzero) digits is 59049, while the sum is 49.

The spelling of 1900019190919 in words is "one trillion, nine hundred billion, nineteen million, one hundred ninety thousand, nine hundred nineteen".