20007887 has 4 divisors (see below), whose sum is σ = 20027976. Its totient is φ = 19987800.

The previous prime is 20007881. The next prime is 20007919. The reversal of 20007887 is 78870002.

It is a happy number.

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 20007887 - 2¹⁸ = 19745743 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 (20007881) 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, 8468 + ... + 10569.

It is an arithmetic number, because the mean of its divisors is an integer number (5006994).

Almost surely, 2^20007887 is an apocalyptic number.

20007887 is a deficient number, since it is larger than the sum of its proper divisors (20089).

20007887 is a wasteful number, since it uses less digits than its factorization.

20007887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20088.

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

The square root of 20007887 is about 4473.0176614898. The cubic root of 20007887 is about 271.4774379898.

Adding to 20007887 its reverse (78870002), we get a palindrome (98877889).

The spelling of 20007887 in words is "twenty million, seven thousand, eight hundred eighty-seven".