20285275 has 6 divisors (see below), whose sum is σ = 25153772. Its totient is φ = 16228200.

The previous prime is 20285263. The next prime is 20285281. The reversal of 20285275 is 57258202.

It is not a de Polignac number, because 20285275 - 2⁹ = 20284763 is a prime.

It is a super-2 number, since 2×20285275² = 822984763651250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405681 + ... + 405730.

Almost surely, 2^20285275 is an apocalyptic number.

20285275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20285275 is a deficient number, since it is larger than the sum of its proper divisors (4868497).

20285275 is an equidigital number, since it uses as much as digits as its factorization.

20285275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811421 (or 811416 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 20285275 is about 4503.9177390356. The cubic root of 20285275 is about 272.7262660737.

The spelling of 20285275 in words is "twenty million, two hundred eighty-five thousand, two hundred seventy-five".