1912000019 has 4 divisors (see below), whose sum is σ = 1913888496. Its totient is φ = 1910111544.

The previous prime is 1912000003. The next prime is 1912000063. The reversal of 1912000019 is 9100002191.

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 1912000019 - 2⁴ = 1912000003 is a prime.

It is a super-2 number, since 2×1912000019² = 7311488145312000722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1911999958 and 1912000003.

It is not an unprimeable number, because it can be changed into a prime (1912000219) 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, 942719 + ... + 944744.

It is an arithmetic number, because the mean of its divisors is an integer number (478472124).

Almost surely, 2^1912000019 is an apocalyptic number.

1912000019 is a deficient number, since it is larger than the sum of its proper divisors (1888477).

1912000019 is a wasteful number, since it uses less digits than its factorization.

1912000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888476.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1912000019 is about 43726.4224354108. The cubic root of 1912000019 is about 1241.1643630904.

The spelling of 1912000019 in words is "one billion, nine hundred twelve million, nineteen", and thus it is an aban number.