20212887 has 8 divisors (see below), whose sum is σ = 26999536. Its totient is φ = 13450752.

The previous prime is 20212853. The next prime is 20212889. The reversal of 20212887 is 78821202.

It is a happy number.

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

It is not a de Polignac number, because 20212887 - 2¹⁸ = 19950743 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 (20212889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4108 + ... + 7569.

It is an arithmetic number, because the mean of its divisors is an integer number (3374942).

Almost surely, 2^20212887 is an apocalyptic number.

20212887 is a deficient number, since it is larger than the sum of its proper divisors (6786649).

20212887 is a wasteful number, since it uses less digits than its factorization.

20212887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12257.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20212887 is about 4495.8744421970. The cubic root of 20212887 is about 272.4014715474.

The spelling of 20212887 in words is "twenty million, two hundred twelve thousand, eight hundred eighty-seven".