20380028 has 12 divisors (see below), whose sum is σ = 35851200. Its totient is φ = 10136832.

The previous prime is 20379977. The next prime is 20380033. The reversal of 20380028 is 82008302.

It is a junction number, because it is equal to n+sod(n) for n = 20379985 and 20380012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12428 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (2987600).

Almost surely, 2^20380028 is an apocalyptic number.

It is an amenable number.

20380028 is a deficient number, since it is larger than the sum of its proper divisors (15471172).

20380028 is a wasteful number, since it uses less digits than its factorization.

20380028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26596 (or 26594 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20380028 is about 4514.4244372899. The cubic root of 20380028 is about 273.1502435706.

The spelling of 20380028 in words is "twenty million, three hundred eighty thousand, twenty-eight".