20087871 has 8 divisors (see below), whose sum is σ = 26835504. Its totient is φ = 13366080.

The previous prime is 20087869. The next prime is 20087927. The reversal of 20087871 is 17878002.

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

It is not a de Polignac number, because 20087871 - 2¹ = 20087869 is a prime.

It is a super-2 number, since 2×20087871² = 807045122625282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20087861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4566 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (3354438).

Almost surely, 2^20087871 is an apocalyptic number.

20087871 is a deficient number, since it is larger than the sum of its proper divisors (6747633).

20087871 is a wasteful number, since it uses less digits than its factorization.

20087871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12921.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 20087871 is about 4481.9494642399. The cubic root of 20087871 is about 271.8387118696.

The spelling of 20087871 in words is "twenty million, eighty-seven thousand, eight hundred seventy-one".