20115884 has 12 divisors (see below), whose sum is σ = 35317464. Its totient is φ = 10025184.

The previous prime is 20115883. The next prime is 20115899. The reversal of 20115884 is 48851102.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20115883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (2943122).

Almost surely, 2^20115884 is an apocalyptic number.

It is an amenable number.

20115884 is a deficient number, since it is larger than the sum of its proper divisors (15201580).

20115884 is a wasteful number, since it uses less digits than its factorization.

20115884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16384 (or 16382 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 20115884 is about 4485.0734665109. The cubic root of 20115884 is about 271.9650149640.

Adding to 20115884 its reverse (48851102), we get a palindrome (68966986).

The spelling of 20115884 in words is "twenty million, one hundred fifteen thousand, eight hundred eighty-four".