20380268 has 12 divisors (see below), whose sum is σ = 36816192. Its totient is φ = 9861360.

The previous prime is 20380267. The next prime is 20380271. The reversal of 20380268 is 86208302.

It is a self number, because there is not a number n which added to its sum of digits gives 20380268.

It is not an unprimeable number, because it can be changed into a prime (20380267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82055 + ... + 82302.

It is an arithmetic number, because the mean of its divisors is an integer number (3068016).

Almost surely, 2^20380268 is an apocalyptic number.

It is an amenable number.

20380268 is a deficient number, since it is larger than the sum of its proper divisors (16435924).

20380268 is a wasteful number, since it uses less digits than its factorization.

20380268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164392 (or 164390 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20380268 is about 4514.4510186733. The cubic root of 20380268 is about 273.1513157935.

The spelling of 20380268 in words is "twenty million, three hundred eighty thousand, two hundred sixty-eight".