20554887 has 8 divisors (see below), whose sum is σ = 29018736. Its totient is φ = 12897152.

The previous prime is 20554873. The next prime is 20554901. The reversal of 20554887 is 78845502.

It is an interprime number because it is at equal distance from previous prime (20554873) and next prime (20554901).

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

It is not a de Polignac number, because 20554887 - 2⁸ = 20554631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554187) 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, 201468 + ... + 201569.

It is an arithmetic number, because the mean of its divisors is an integer number (3627342).

Almost surely, 2^20554887 is an apocalyptic number.

20554887 is a deficient number, since it is larger than the sum of its proper divisors (8463849).

20554887 is a wasteful number, since it uses less digits than its factorization.

20554887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403057.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 20554887 is about 4533.7497725393. The cubic root of 20554887 is about 273.9292223106.

The spelling of 20554887 in words is "twenty million, five hundred fifty-four thousand, eight hundred eighty-seven".