20113884 has 36 divisors (see below), whose sum is σ = 58107504. Its totient is φ = 5746752.

The previous prime is 20113883. The next prime is 20113927. The reversal of 20113884 is 48831102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39657 + ... + 40160.

Almost surely, 2^20113884 is an apocalyptic number.

It is an amenable number.

20113884 is an abundant number, since it is smaller than the sum of its proper divisors (37993620).

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

20113884 is a wasteful number, since it uses less digits than its factorization.

20113884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79834 (or 79829 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20113884 is about 4484.8504991805. The cubic root of 20113884 is about 271.9560013895.

Adding to 20113884 its reverse (48831102), we get a palindrome (68944986).

The spelling of 20113884 in words is "twenty million, one hundred thirteen thousand, eight hundred eighty-four".