18790842 has 16 divisors (see below), whose sum is σ = 42950592. Its totient is φ = 5368800.

The previous prime is 18790841. The next prime is 18790847. The reversal of 18790842 is 24809781.

It is a self number, because there is not a number n which added to its sum of digits gives 18790842.

It is not an unprimeable number, because it can be changed into a prime (18790841) 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, 223659 + ... + 223742.

It is an arithmetic number, because the mean of its divisors is an integer number (2684412).

Almost surely, 2^18790842 is an apocalyptic number.

18790842 is an abundant number, since it is smaller than the sum of its proper divisors (24159750).

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

18790842 is a wasteful number, since it uses less digits than its factorization.

18790842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447413.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 18790842 is about 4334.8404814941. The cubic root of 18790842 is about 265.8573961921.

The spelling of 18790842 in words is "eighteen million, seven hundred ninety thousand, eight hundred forty-two".