20015087 has 2 divisors, whose sum is σ = 20015088. Its totient is φ = 20015086.

The previous prime is 20015059. The next prime is 20015131. The reversal of 20015087 is 78051002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20015087 - 2²⁰ = 18966511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007543 + 10007544.

It is an arithmetic number, because the mean of its divisors is an integer number (10007544).

Almost surely, 2^20015087 is an apocalyptic number.

20015087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015087 is an equidigital number, since it uses as much as digits as its factorization.

20015087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 20015087 is about 4473.8224148931. The cubic root of 20015087 is about 271.5099985352.

Adding to 20015087 its reverse (78051002), we get a palindrome (98066089).

The spelling of 20015087 in words is "twenty million, fifteen thousand, eighty-seven".