18801798 has 8 divisors (see below), whose sum is σ = 37603608. Its totient is φ = 6267264.

The previous prime is 18801791. The next prime is 18801823. The reversal of 18801798 is 89710881.

It is a sphenic number, since it is the product of 3 distinct primes.

18801798 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18801791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566811 + ... + 1566822.

It is an arithmetic number, because the mean of its divisors is an integer number (4700451).

Almost surely, 2^18801798 is an apocalyptic number.

18801798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18801798 is a wasteful number, since it uses less digits than its factorization.

18801798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133638.

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 18801798 is about 4336.1040116676. The cubic root of 18801798 is about 265.9090555363.

The spelling of 18801798 in words is "eighteen million, eight hundred one thousand, seven hundred ninety-eight".