1851942842 has 32 divisors (see below), whose sum is σ = 3041038080. Its totient is φ = 843082240.

The previous prime is 1851942803. The next prime is 1851942853. The reversal of 1851942842 is 2482491581.

It is a junction number, because it is equal to n+sod(n) for n = 1851942793 and 1851942802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84938 + ... + 104490.

It is an arithmetic number, because the mean of its divisors is an integer number (95032440).

Almost surely, 2^1851942842 is an apocalyptic number.

1851942842 is a deficient number, since it is larger than the sum of its proper divisors (1189095238).

1851942842 is a wasteful number, since it uses less digits than its factorization.

1851942842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19678.

The product of its digits is 184320, while the sum is 44.

The square root of 1851942842 is about 43034.2054881928. The cubic root of 1851942842 is about 1228.0306118517.

The spelling of 1851942842 in words is "one billion, eight hundred fifty-one million, nine hundred forty-two thousand, eight hundred forty-two".