20425115 has 8 divisors (see below), whose sum is σ = 24550128. Its totient is φ = 16313440.

The previous prime is 20425103. The next prime is 20425117. The reversal of 20425115 is 51152402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20425115 - 2⁴ = 20425099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425 + ... + 6405.

It is an arithmetic number, because the mean of its divisors is an integer number (3068766).

Almost surely, 2^20425115 is an apocalyptic number.

20425115 is a deficient number, since it is larger than the sum of its proper divisors (4125013).

20425115 is an equidigital number, since it uses as much as digits as its factorization.

20425115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 20425115 is about 4519.4153382932. The cubic root of 20425115 is about 273.3515264842.

Adding to 20425115 its reverse (51152402), we get a palindrome (71577517).

The spelling of 20425115 in words is "twenty million, four hundred twenty-five thousand, one hundred fifteen".