1900000019 has 8 divisors (see below), whose sum is σ = 2117647440. Its totient is φ = 1694117376.

The previous prime is 1899999979. The next prime is 1900000043. The reversal of 1900000019 is 9100000091.

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 1900000019 - 2¹⁶ = 1899934483 is a prime.

It is a super-2 number, since 2×1900000019² = 7220000144400000722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1900000519) 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, 2940854 + ... + 2941499.

It is an arithmetic number, because the mean of its divisors is an integer number (264705930).

Almost surely, 2^1900000019 is an apocalyptic number.

1900000019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1900000019 is a deficient number, since it is larger than the sum of its proper divisors (217647421).

1900000019 is a wasteful number, since it uses less digits than its factorization.

1900000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882389.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1900000019 is about 43588.9896533517. The cubic root of 1900000019 is about 1238.5623337587.

It can be divided in two parts, 19000000 and 19, that multiplied together give a square (361000000 = 19000²).

The spelling of 1900000019 in words is "one billion, nine hundred million, nineteen", and thus it is an aban number.