20015015 has 16 divisors (see below), whose sum is σ = 24641280. Its totient is φ = 15601920.

The previous prime is 20014993. The next prime is 20015029. The reversal of 20015015 is 51051002.

It is not a de Polignac number, because 20015015 - 2⁸ = 20014759 is a prime.

20015015 is a modest number, since divided by 15015 gives 20 as remainder.

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, 41546 + ... + 42024.

It is an arithmetic number, because the mean of its divisors is an integer number (1540080).

Almost surely, 2^20015015 is an apocalyptic number.

20015015 is a deficient number, since it is larger than the sum of its proper divisors (4626265).

20015015 is a wasteful number, since it uses less digits than its factorization.

20015015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 20015015 is about 4473.8143680756. The cubic root of 20015015 is about 271.5096729684.

Adding to 20015015 its reverse (51051002), we get a palindrome (71066017).

The spelling of 20015015 in words is "twenty million, fifteen thousand, fifteen".