20087087 has 4 divisors (see below), whose sum is σ = 20097240. Its totient is φ = 20076936.

The previous prime is 20087083. The next prime is 20087131. The reversal of 20087087 is 78078002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20087087 - 2² = 20087083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20087083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037 + ... + 6422.

It is an arithmetic number, because the mean of its divisors is an integer number (5024310).

Almost surely, 2^20087087 is an apocalyptic number.

20087087 is a deficient number, since it is larger than the sum of its proper divisors (10153).

20087087 is an equidigital number, since it uses as much as digits as its factorization.

20087087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 20087087 is about 4481.8620014454. The cubic root of 20087087 is about 271.8351753355.

The spelling of 20087087 in words is "twenty million, eighty-seven thousand, eighty-seven".