20554065 has 48 divisors (see below), whose sum is σ = 42501888. Its totient is φ = 8984448.

The previous prime is 20554063. The next prime is 20554073. The reversal of 20554065 is 56045502.

20554065 = T₁₈₄ + T₁₈₅ + ... + T₅₀₅.

It is not a de Polignac number, because 20554065 - 2¹ = 20554063 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554063) 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 47 ways as a sum of consecutive naturals, for example, 5827 + ... + 8663.

It is an arithmetic number, because the mean of its divisors is an integer number (885456).

Almost surely, 2^20554065 is an apocalyptic number.

It is an amenable number.

20554065 is an abundant number, since it is smaller than the sum of its proper divisors (21947823).

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

20554065 is a wasteful number, since it uses less digits than its factorization.

20554065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 20554065 is about 4533.6591181958. The cubic root of 20554065 is about 273.9255707406.

Adding to 20554065 its reverse (56045502), we get a palindrome (76599567).

The spelling of 20554065 in words is "twenty million, five hundred fifty-four thousand, sixty-five".