20268880 has 20 divisors (see below), whose sum is σ = 47125332. Its totient is φ = 8107520.

The previous prime is 20268851. The next prime is 20268893. The reversal of 20268880 is 8886202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5798464 + 14470416 = 2408^2 + 3804^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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, 126601 + ... + 126760.

Almost surely, 2^20268880 is an apocalyptic number.

20268880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20268880 is an abundant number, since it is smaller than the sum of its proper divisors (26856452).

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

20268880 is a wasteful number, since it uses less digits than its factorization.

20268880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253374 (or 253368 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 20268880 is about 4502.0972890421. The cubic root of 20268880 is about 272.6527718390.

The spelling of 20268880 in words is "twenty million, two hundred sixty-eight thousand, eight hundred eighty".