20380768 has 24 divisors (see below), whose sum is σ = 42237720. Its totient is φ = 9653760.

The previous prime is 20380721. The next prime is 20380769. The reversal of 20380768 is 86708302.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16153 + ... + 17368.

It is an arithmetic number, because the mean of its divisors is an integer number (1759905).

Almost surely, 2^20380768 is an apocalyptic number.

It is an amenable number.

20380768 is an abundant number, since it is smaller than the sum of its proper divisors (21856952).

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

20380768 is a wasteful number, since it uses less digits than its factorization.

20380768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33550 (or 33542 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20380768 is about 4514.5063960526. The cubic root of 20380768 is about 273.1535495643.

The spelling of 20380768 in words is "twenty million, three hundred eighty thousand, seven hundred sixty-eight".