20342225 has 24 divisors (see below), whose sum is σ = 26188800. Its totient is φ = 15664320.

The previous prime is 20342213. The next prime is 20342243. The reversal of 20342225 is 52224302.

It is not a de Polignac number, because 20342225 - 2⁴ = 20342209 is a prime.

It is a super-2 number, since 2×20342225² = 827612235901250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20342197 and 20342206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136451 + ... + 136599.

It is an arithmetic number, because the mean of its divisors is an integer number (1091200).

Almost surely, 2^20342225 is an apocalyptic number.

20342225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20342225 is a deficient number, since it is larger than the sum of its proper divisors (5846575).

20342225 is a wasteful number, since it uses less digits than its factorization.

20342225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20342225 is about 4510.2355814303. The cubic root of 20342225 is about 272.9812498583.

Adding to 20342225 its reverse (52224302), we get a palindrome (72566527).

The spelling of 20342225 in words is "twenty million, three hundred forty-two thousand, two hundred twenty-five".