20219028 has 12 divisors (see below), whose sum is σ = 47177760. Its totient is φ = 6739672.

The previous prime is 20219011. The next prime is 20219033. The reversal of 20219028 is 82091202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20218989 and 20219007.

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, 842448 + ... + 842471.

It is an arithmetic number, because the mean of its divisors is an integer number (3931480).

Almost surely, 2^20219028 is an apocalyptic number.

It is an amenable number.

20219028 is an abundant number, since it is smaller than the sum of its proper divisors (26958732).

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

20219028 is a wasteful number, since it uses less digits than its factorization.

20219028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684926 (or 1684924 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20219028 is about 4496.5573497955. The cubic root of 20219028 is about 272.4290554028.

The spelling of 20219028 in words is "twenty million, two hundred nineteen thousand, twenty-eight".