20190256 has 10 divisors (see below), whose sum is σ = 39118652. Its totient is φ = 10095120.

The previous prime is 20190241. The next prime is 20190277. The reversal of 20190256 is 65209102.

It is a self number, because there is not a number n which added to its sum of digits gives 20190256.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630930 + ... + 630961.

Almost surely, 2^20190256 is an apocalyptic number.

It is an amenable number.

20190256 is a deficient number, since it is larger than the sum of its proper divisors (18928396).

20190256 is a wasteful number, since it uses less digits than its factorization.

20190256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261899 (or 1261893 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20190256 is about 4493.3568743201. The cubic root of 20190256 is about 272.2997704252.

Adding to 20190256 its reverse (65209102), we get a palindrome (85399358).

The spelling of 20190256 in words is "twenty million, one hundred ninety thousand, two hundred fifty-six".