20206887 has 8 divisors (see below), whose sum is σ = 26972400. Its totient is φ = 13456320.

The previous prime is 20206867. The next prime is 20206889. The reversal of 20206887 is 78860202.

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

It is not a de Polignac number, because 20206887 - 2⁷ = 20206759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206889) 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, 64 + ... + 6357.

It is an arithmetic number, because the mean of its divisors is an integer number (3371550).

Almost surely, 2^20206887 is an apocalyptic number.

20206887 is a deficient number, since it is larger than the sum of its proper divisors (6765513).

20206887 is a wasteful number, since it uses less digits than its factorization.

20206887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20206887 is about 4495.2071142496. The cubic root of 20206887 is about 272.3745156327.

The spelling of 20206887 in words is "twenty million, two hundred six thousand, eight hundred eighty-seven".