20116880 has 40 divisors (see below), whose sum is σ = 53454912. Its totient is φ = 6897024.

The previous prime is 20116871. The next prime is 20116891. The reversal of 20116880 is 8861102.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17402 + ... + 18521.

Almost surely, 2^20116880 is an apocalyptic number.

20116880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20116880 is an abundant number, since it is smaller than the sum of its proper divisors (33338032).

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

20116880 is a wasteful number, since it uses less digits than its factorization.

20116880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35943 (or 35937 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 20116880 is about 4485.1845001070. The cubic root of 20116880 is about 271.9695035013.

Adding to 20116880 its reverse (8861102), we get a palindrome (28977982).

The spelling of 20116880 in words is "twenty million, one hundred sixteen thousand, eight hundred eighty".