20086487 has 4 divisors (see below), whose sum is σ = 20103360. Its totient is φ = 20069616.

The previous prime is 20086471. The next prime is 20086489. The reversal of 20086487 is 78468002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20086487 - 2⁴ = 20086471 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 (20086489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503 + ... + 9080.

It is an arithmetic number, because the mean of its divisors is an integer number (5025840).

Almost surely, 2^20086487 is an apocalyptic number.

20086487 is a deficient number, since it is larger than the sum of its proper divisors (16873).

20086487 is a wasteful number, since it uses less digits than its factorization.

20086487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16872.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20086487 is about 4481.7950644803. The cubic root of 20086487 is about 271.8324687421.

The spelling of 20086487 in words is "twenty million, eighty-six thousand, four hundred eighty-seven".