1819042459 has 16 divisors (see below), whose sum is σ = 2069208064. Its totient is φ = 1587146400.

The previous prime is 1819042453. The next prime is 1819042471. The reversal of 1819042459 is 9542409181.

It is a cyclic number.

It is not a de Polignac number, because 1819042459 - 2³ = 1819042451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819042451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35157 + ... + 69814.

It is an arithmetic number, because the mean of its divisors is an integer number (129325504).

Almost surely, 2^1819042459 is an apocalyptic number.

1819042459 is a deficient number, since it is larger than the sum of its proper divisors (250165605).

1819042459 is a wasteful number, since it uses less digits than its factorization.

1819042459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105058.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1819042459 is about 42650.2339852902. The cubic root of 1819042459 is about 1220.7149931888.

The spelling of 1819042459 in words is "one billion, eight hundred nineteen million, forty-two thousand, four hundred fifty-nine".