20986028 has 24 divisors (see below), whose sum is σ = 43798272. Its totient is φ = 8602704.

The previous prime is 20986003. The next prime is 20986057. The reversal of 20986028 is 82068902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15650 + ... + 16937.

It is an arithmetic number, because the mean of its divisors is an integer number (1824928).

Almost surely, 2^20986028 is an apocalyptic number.

20986028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20986028 is an abundant number, since it is smaller than the sum of its proper divisors (22812244).

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

20986028 is a wasteful number, since it uses less digits than its factorization.

20986028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32621 (or 32619 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20986028 is about 4581.0509711201. The cubic root of 20986028 is about 275.8312172559.

The spelling of 20986028 in words is "twenty million, nine hundred eighty-six thousand, twenty-eight".