20340275 has 12 divisors (see below), whose sum is σ = 25278144. Its totient is φ = 16236000.

The previous prime is 20340263. The next prime is 20340277. The reversal of 20340275 is 57204302.

It is not a de Polignac number, because 20340275 - 2¹⁸ = 20078131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20340275.

It is not an unprimeable number, because it can be changed into a prime (20340277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20030 + ... + 21020.

It is an arithmetic number, because the mean of its divisors is an integer number (2106512).

Almost surely, 2^20340275 is an apocalyptic number.

20340275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20340275 is a deficient number, since it is larger than the sum of its proper divisors (4937869).

20340275 is an equidigital number, since it uses as much as digits as its factorization.

20340275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20340275 is about 4510.0194012886. The cubic root of 20340275 is about 272.9725269442.

Adding to 20340275 its reverse (57204302), we get a palindrome (77544577).

The spelling of 20340275 in words is "twenty million, three hundred forty thousand, two hundred seventy-five".