20167887 has 8 divisors (see below), whose sum is σ = 27758080. Its totient is φ = 13011480.

The previous prime is 20167853. The next prime is 20167891. The reversal of 20167887 is 78876102.

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

It is not a de Polignac number, because 20167887 - 2¹² = 20163791 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20167837) 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, 108337 + ... + 108522.

It is an arithmetic number, because the mean of its divisors is an integer number (3469760).

Almost surely, 2^20167887 is an apocalyptic number.

20167887 is a deficient number, since it is larger than the sum of its proper divisors (7590193).

20167887 is a wasteful number, since it uses less digits than its factorization.

20167887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216893.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 20167887 is about 4490.8670655008. The cubic root of 20167887 is about 272.1991719912.

The spelling of 20167887 in words is "twenty million, one hundred sixty-seven thousand, eight hundred eighty-seven".