18922842 has 16 divisors (see below), whose sum is σ = 42050880. Its totient is φ = 6307596.

The previous prime is 18922837. The next prime is 18922861. The reversal of 18922842 is 24822981.

It is a junction number, because it is equal to n+sod(n) for n = 18922797 and 18922806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175158 + ... + 175265.

It is an arithmetic number, because the mean of its divisors is an integer number (2628180).

Almost surely, 2^18922842 is an apocalyptic number.

18922842 is an abundant number, since it is smaller than the sum of its proper divisors (23128038).

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

18922842 is a wasteful number, since it uses less digits than its factorization.

18922842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350434 (or 350428 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18922842 is about 4350.0393101672. The cubic root of 18922842 is about 266.4784668622.

The spelling of 18922842 in words is "eighteen million, nine hundred twenty-two thousand, eight hundred forty-two".