20554890 has 32 divisors (see below), whose sum is σ = 49553856. Its totient is φ = 5456640.

The previous prime is 20554873. The next prime is 20554901. The reversal of 20554890 is 9845502.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5809 + ... + 8651.

It is an arithmetic number, because the mean of its divisors is an integer number (1548558).

Almost surely, 2^20554890 is an apocalyptic number.

20554890 is an abundant number, since it is smaller than the sum of its proper divisors (28998966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20554890 is a wasteful number, since it uses less digits than its factorization.

20554890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20554890 is about 4533.7501033912. The cubic root of 20554890 is about 273.9292356373.

The spelling of 20554890 in words is "twenty million, five hundred fifty-four thousand, eight hundred ninety".