1011801834 has 32 divisors (see below), whose sum is σ = 2252033280. Its totient is φ = 336729600.

The previous prime is 1011801821. The next prime is 1011801881. The reversal of 1011801834 is 4381081101.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1011801798 and 1011801807.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19999 + ... + 49229.

It is an arithmetic number, because the mean of its divisors is an integer number (70376040).

Almost surely, 2^1011801834 is an apocalyptic number.

1011801834 is an abundant number, since it is smaller than the sum of its proper divisors (1240231446).

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

1011801834 is a wasteful number, since it uses less digits than its factorization.

1011801834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29883 (or 29877 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 1011801834 is about 31808.8326412649. The cubic root of 1011801834 is about 1003.9185694236.

Adding to 1011801834 its reverse (4381081101), we get a palindrome (5392882935).

The spelling of 1011801834 in words is "one billion, eleven million, eight hundred one thousand, eight hundred thirty-four".