1894249019 has 12 divisors (see below), whose sum is σ = 2132518416. Its totient is φ = 1672508112.

The previous prime is 1894248989. The next prime is 1894249051. The reversal of 1894249019 is 9109424981.

It is not a de Polignac number, because 1894249019 - 2¹² = 1894244923 is a prime.

It is a super-2 number, since 2×1894249019² = 7176358691964924722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1894249519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130847 + ... + 144600.

It is an arithmetic number, because the mean of its divisors is an integer number (177709868).

Almost surely, 2^1894249019 is an apocalyptic number.

1894249019 is a deficient number, since it is larger than the sum of its proper divisors (238269397).

1894249019 is a wasteful number, since it uses less digits than its factorization.

1894249019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275506 (or 275483 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1894249019 is about 43522.9711646620. The cubic root of 1894249019 is about 1237.3114266143.

The spelling of 1894249019 in words is "one billion, eight hundred ninety-four million, two hundred forty-nine thousand, nineteen".