18869842 has 16 divisors (see below), whose sum is σ = 29082240. Its totient is φ = 9178288.

The previous prime is 18869839. The next prime is 18869849. The reversal of 18869842 is 24896881.

It is a junction number, because it is equal to n+sod(n) for n = 18869792 and 18869801.

It is not an unprimeable number, because it can be changed into a prime (18869849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18009 + ... + 19027.

It is an arithmetic number, because the mean of its divisors is an integer number (1817640).

Almost surely, 2^18869842 is an apocalyptic number.

18869842 is a deficient number, since it is larger than the sum of its proper divisors (10212398).

18869842 is a wasteful number, since it uses less digits than its factorization.

18869842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265.

The product of its digits is 221184, while the sum is 46.

The square root of 18869842 is about 4343.9431395910. The cubic root of 18869842 is about 266.2294456864.

The spelling of 18869842 in words is "eighteen million, eight hundred sixty-nine thousand, eight hundred forty-two".