20028236 has 6 divisors (see below), whose sum is σ = 35049420. Its totient is φ = 10014116.

The previous prime is 20028221. The next prime is 20028257. The reversal of 20028236 is 63282002.

It is a super-2 number, since 2×20028236² = 802260474543392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2503526 + ... + 2503533.

It is an arithmetic number, because the mean of its divisors is an integer number (5841570).

Almost surely, 2^20028236 is an apocalyptic number.

It is an amenable number.

20028236 is a deficient number, since it is larger than the sum of its proper divisors (15021184).

20028236 is a wasteful number, since it uses less digits than its factorization.

20028236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007063 (or 5007061 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20028236 is about 4475.2917223350. The cubic root of 20028236 is about 271.5694420850.

The spelling of 20028236 in words is "twenty million, twenty-eight thousand, two hundred thirty-six".