1866242942 has 4 divisors (see below), whose sum is σ = 2799364416. Its totient is φ = 933121470.

The previous prime is 1866242941. The next prime is 1866242969. The reversal of 1866242942 is 2492426681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1866242893 and 1866242902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866242941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 466560734 + ... + 466560737.

It is an arithmetic number, because the mean of its divisors is an integer number (699841104).

Almost surely, 2^1866242942 is an apocalyptic number.

1866242942 is a deficient number, since it is larger than the sum of its proper divisors (933121474).

1866242942 is an equidigital number, since it uses as much as digits as its factorization.

1866242942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933121473.

The product of its digits is 331776, while the sum is 44.

The square root of 1866242942 is about 43200.0340509125. The cubic root of 1866242942 is about 1231.1833285654.

The spelling of 1866242942 in words is "one billion, eight hundred sixty-six million, two hundred forty-two thousand, nine hundred forty-two".