20455365 has 16 divisors (see below), whose sum is σ = 37404288. Its totient is φ = 9350976.

The previous prime is 20455363. The next prime is 20455397. The reversal of 20455365 is 56355402.

It is not a de Polignac number, because 20455365 - 2¹ = 20455363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455361) 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 15 ways as a sum of consecutive naturals, for example, 97302 + ... + 97511.

It is an arithmetic number, because the mean of its divisors is an integer number (2337768).

Almost surely, 2^20455365 is an apocalyptic number.

It is an amenable number.

20455365 is a deficient number, since it is larger than the sum of its proper divisors (16948923).

20455365 is a wasteful number, since it uses less digits than its factorization.

20455365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194828.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 20455365 is about 4522.7607719180. The cubic root of 20455365 is about 273.4864062618.

The spelling of 20455365 in words is "twenty million, four hundred fifty-five thousand, three hundred sixty-five".