20245015 has 32 divisors (see below), whose sum is σ = 29343744. Its totient is φ = 13115520.

The previous prime is 20245007. The next prime is 20245019. The reversal of 20245015 is 51054202.

It is not a de Polignac number, because 20245015 - 2³ = 20245007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20244983 and 20245001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245019) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 50797 + ... + 51193.

It is an arithmetic number, because the mean of its divisors is an integer number (916992).

Almost surely, 2^20245015 is an apocalyptic number.

20245015 is a deficient number, since it is larger than the sum of its proper divisors (9098729).

20245015 is a wasteful number, since it uses less digits than its factorization.

20245015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20245015 is about 4499.4460770188. The cubic root of 20245015 is about 272.5457208024.

Adding to 20245015 its reverse (51054202), we get a palindrome (71299217).

The spelling of 20245015 in words is "twenty million, two hundred forty-five thousand, fifteen".