20025015 has 16 divisors (see below), whose sum is σ = 32822496. Its totient is φ = 10419200.

The previous prime is 20025001. The next prime is 20025037. The reversal of 20025015 is 51052002.

It is not a de Polignac number, because 20025015 - 2⁷ = 20024887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20024985 and 20025003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15666 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (2051406).

Almost surely, 2^20025015 is an apocalyptic number.

20025015 is a deficient number, since it is larger than the sum of its proper divisors (12797481).

20025015 is a wasteful number, since it uses less digits than its factorization.

20025015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32610.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20025015 is about 4474.9318430564. The cubic root of 20025015 is about 271.5548831048.

Adding to 20025015 its reverse (51052002), we get a palindrome (71077017).

The spelling of 20025015 in words is "twenty million, twenty-five thousand, fifteen".