20225015 has 8 divisors (see below), whose sum is σ = 24602928. Its totient is φ = 15958080.

The previous prime is 20225011. The next prime is 20225017. The reversal of 20225015 is 51052202.

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

It is not a de Polignac number, because 20225015 - 2² = 20225011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20224984 and 20225002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225011) 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, 27341 + ... + 28070.

It is an arithmetic number, because the mean of its divisors is an integer number (3075366).

Almost surely, 2^20225015 is an apocalyptic number.

20225015 is a deficient number, since it is larger than the sum of its proper divisors (4377913).

20225015 is an equidigital number, since it uses as much as digits as its factorization.

20225015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55489.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20225015 is about 4497.2230320499. The cubic root of 20225015 is about 272.4559421519.

Adding to 20225015 its reverse (51052202), we get a palindrome (71277217).

The spelling of 20225015 in words is "twenty million, two hundred twenty-five thousand, fifteen".