20455045 has 8 divisors (see below), whose sum is σ = 26434296. Its totient is φ = 15105216.

The previous prime is 20455013. The next prime is 20455051. The reversal of 20455045 is 54055402.

It can be written as a sum of positive squares in 4 ways, for example, as 6561 + 20448484 = 81^2 + 4522^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20455045 - 2⁵ = 20455013 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 157282 + ... + 157411.

It is an arithmetic number, because the mean of its divisors is an integer number (3304287).

Almost surely, 2^20455045 is an apocalyptic number.

It is an amenable number.

20455045 is a deficient number, since it is larger than the sum of its proper divisors (5979251).

20455045 is a wasteful number, since it uses less digits than its factorization.

20455045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314711.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20455045 is about 4522.7253951572. The cubic root of 20455045 is about 273.4849801305.

The spelling of 20455045 in words is "twenty million, four hundred fifty-five thousand, forty-five".