20465055 has 80 divisors (see below), whose sum is σ = 41469120. Its totient is φ = 9637056.

The previous prime is 20465051. The next prime is 20465057. The reversal of 20465055 is 55056402.

20465055 is a `hidden beast` number, since 2 + 0 + 4 + 650 + 5 + 5 = 666.

It is not a de Polignac number, because 20465055 - 2² = 20465051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465051) 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 79 ways as a sum of consecutive naturals, for example, 889774 + ... + 889796.

It is an arithmetic number, because the mean of its divisors is an integer number (518364).

Almost surely, 2^20465055 is an apocalyptic number.

20465055 is an abundant number, since it is smaller than the sum of its proper divisors (21004065).

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

20465055 is an equidigital number, since it uses as much as digits as its factorization.

20465055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 44 counting only the distinct ones).

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

The square root of 20465055 is about 4523.8318934284. The cubic root of 20465055 is about 273.5295842565.

The spelling of 20465055 in words is "twenty million, four hundred sixty-five thousand, fifty-five".