20041998 has 32 divisors (see below), whose sum is σ = 42397440. Its totient is φ = 6316056.

The previous prime is 20041981. The next prime is 20042041. The reversal of 20041998 is 89914002.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40911 + ... + 41397.

It is an arithmetic number, because the mean of its divisors is an integer number (1324920).

Almost surely, 2^20041998 is an apocalyptic number.

20041998 is an abundant number, since it is smaller than the sum of its proper divisors (22355442).

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

20041998 is an equidigital number, since it uses as much as digits as its factorization.

20041998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20041998 is about 4476.8290117001. The cubic root of 20041998 is about 271.6316290057.

The spelling of 20041998 in words is "twenty million, forty-one thousand, nine hundred ninety-eight".