20886080 has 28 divisors (see below), whose sum is σ = 49735740. Its totient is φ = 8354304.

The previous prime is 20886049. The next prime is 20886083. The reversal of 20886080 is 8068802.

It can be written as a sum of positive squares in 2 ways, for example, as 5456896 + 15429184 = 2336^2 + 3928^2 .

It is a super-3 number, since 3×20886080³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32315 + ... + 32954.

Almost surely, 2^20886080 is an apocalyptic number.

20886080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20886080 is an abundant number, since it is smaller than the sum of its proper divisors (28849660).

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

20886080 is an equidigital number, since it uses as much as digits as its factorization.

20886080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65286 (or 65276 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 20886080 is about 4570.1291010211. The cubic root of 20886080 is about 275.3926292423.

The spelling of 20886080 in words is "twenty million, eight hundred eighty-six thousand, eighty".