20081275 has 6 divisors (see below), whose sum is σ = 24900812. Its totient is φ = 16065000.

The previous prime is 20081263. The next prime is 20081291. The reversal of 20081275 is 57218002.

It is not a de Polignac number, because 20081275 - 2⁹ = 20080763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 803251 = 20081275 / (2 + 0 + 0 + 8 + 1 + 2 + 7 + 5).

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, 401601 + ... + 401650.

Almost surely, 2^20081275 is an apocalyptic number.

20081275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20081275 is a deficient number, since it is larger than the sum of its proper divisors (4819537).

20081275 is an equidigital number, since it uses as much as digits as its factorization.

20081275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803261 (or 803256 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20081275 is about 4481.2135633107. The cubic root of 20081275 is about 271.8089551998.

Adding to 20081275 its reverse (57218002), we get a palindrome (77299277).

The spelling of 20081275 in words is "twenty million, eighty-one thousand, two hundred seventy-five".