20081798 has 8 divisors (see below), whose sum is σ = 32861160. Its totient is φ = 9128080.

The previous prime is 20081797. The next prime is 20081821. The reversal of 20081798 is 89718002.

It is a happy number.

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

It is a super-2 number, since 2×20081798² = 806557221825608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20081797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456383 + ... + 456426.

It is an arithmetic number, because the mean of its divisors is an integer number (4107645).

Almost surely, 2^20081798 is an apocalyptic number.

20081798 is a deficient number, since it is larger than the sum of its proper divisors (12779362).

20081798 is a wasteful number, since it uses less digits than its factorization.

20081798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912822.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 20081798 is about 4481.2719176591. The cubic root of 20081798 is about 271.8113148582.

The spelling of 20081798 in words is "twenty million, eighty-one thousand, seven hundred ninety-eight".