20041988 has 6 divisors (see below), whose sum is σ = 35073486. Its totient is φ = 10020992.

The previous prime is 20041981. The next prime is 20042041. The reversal of 20041988 is 88914002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19430464 + 611524 = 4408^2 + 782^2 .

It is not an unprimeable number, because it can be changed into a prime (20041981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2505245 + ... + 2505252.

It is an arithmetic number, because the mean of its divisors is an integer number (5845581).

Almost surely, 2^20041988 is an apocalyptic number.

It is an amenable number.

20041988 is a deficient number, since it is larger than the sum of its proper divisors (15031498).

20041988 is a wasteful number, since it uses less digits than its factorization.

20041988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010501 (or 5010499 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 20041988 is about 4476.8278948380. The cubic root of 20041988 is about 271.6315838287.

The spelling of 20041988 in words is "twenty million, forty-one thousand, nine hundred eighty-eight".