20554889 has 4 divisors (see below), whose sum is σ = 20566224. Its totient is φ = 20543556.

The previous prime is 20554873. The next prime is 20554901. The reversal of 20554889 is 98845502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20554889 - 2⁴ = 20554873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20554189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2267 + ... + 6800.

It is an arithmetic number, because the mean of its divisors is an integer number (5141556).

Almost surely, 2^20554889 is an apocalyptic number.

It is an amenable number.

20554889 is a deficient number, since it is larger than the sum of its proper divisors (11335).

20554889 is an equidigital number, since it uses as much as digits as its factorization.

20554889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11334.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 20554889 is about 4533.7499931073. The cubic root of 20554889 is about 273.9292311950.

The spelling of 20554889 in words is "twenty million, five hundred fifty-four thousand, eight hundred eighty-nine".