20087805 has 8 divisors (see below), whose sum is σ = 32140512. Its totient is φ = 10713488.

The previous prime is 20087797. The next prime is 20087813. The reversal of 20087805 is 50878002.

It is an interprime number because it is at equal distance from previous prime (20087797) and next prime (20087813).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20087805 - 2³ = 20087797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669579 + ... + 669608.

It is an arithmetic number, because the mean of its divisors is an integer number (4017564).

Almost surely, 2^20087805 is an apocalyptic number.

It is an amenable number.

20087805 is a deficient number, since it is larger than the sum of its proper divisors (12052707).

20087805 is a wasteful number, since it uses less digits than its factorization.

20087805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339195.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 20087805 is about 4481.9421013663. The cubic root of 20087805 is about 271.8384141547.

The spelling of 20087805 in words is "twenty million, eighty-seven thousand, eight hundred five".