1831850842 has 4 divisors (see below), whose sum is σ = 2747776266. Its totient is φ = 915925420.

The previous prime is 1831850747. The next prime is 1831850843. The reversal of 1831850842 is 2480581381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2480581381 = 29 ⋅85537289.

It can be written as a sum of positive squares in only one way, i.e., 1572994921 + 258855921 = 39661^2 + 16089^2 .

It is a super-2 number, since 2×1831850842² = 6711355014672217928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1831850795 and 1831850804.

It is not an unprimeable number, because it can be changed into a prime (1831850843) 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 as a sum of consecutive naturals, namely, 457962709 + ... + 457962712.

Almost surely, 2^1831850842 is an apocalyptic number.

1831850842 is a deficient number, since it is larger than the sum of its proper divisors (915925424).

1831850842 is an equidigital number, since it uses as much as digits as its factorization.

1831850842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915925423.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 1831850842 is about 42800.1266586911. The cubic root of 1831850842 is about 1223.5734257078.

The spelling of 1831850842 in words is "one billion, eight hundred thirty-one million, eight hundred fifty thousand, eight hundred forty-two".