1816905834 has 24 divisors (see below), whose sum is σ = 3937883040. Its totient is φ = 605442408.

The previous prime is 1816905803. The next prime is 1816905847. The reversal of 1816905834 is 4385096181.

1816905834 is a `hidden beast` number, since 1 + 8 + 1 + 69 + 0 + 583 + 4 = 666.

It is a super-2 number, since 2×1816905834² = 6602293619246471112, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1816905834.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49177 + ... + 77795.

It is an arithmetic number, because the mean of its divisors is an integer number (164078460).

Almost surely, 2^1816905834 is an apocalyptic number.

1816905834 is an abundant number, since it is smaller than the sum of its proper divisors (2120977206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816905834 is a wasteful number, since it uses less digits than its factorization.

1816905834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32154 (or 32151 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1816905834 is about 42625.1784043187. The cubic root of 1816905834 is about 1220.2368603087.

The spelling of 1816905834 in words is "one billion, eight hundred sixteen million, nine hundred five thousand, eight hundred thirty-four".