20455012 has 12 divisors (see below), whose sum is σ = 37902060. Its totient is φ = 9625856.

The previous prime is 20455007. The next prime is 20455013. The reversal of 20455012 is 21055402.

It can be written as a sum of positive squares in 2 ways, for example, as 18455616 + 1999396 = 4296^2 + 1414^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455013) 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 3 ways as a sum of consecutive naturals, for example, 150337 + ... + 150472.

It is an arithmetic number, because the mean of its divisors is an integer number (3158505).

Almost surely, 2^20455012 is an apocalyptic number.

It is an amenable number.

20455012 is a deficient number, since it is larger than the sum of its proper divisors (17447048).

20455012 is a wasteful number, since it uses less digits than its factorization.

20455012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300830 (or 300828 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20455012 is about 4522.7217469130. The cubic root of 20455012 is about 273.4848330599.

The spelling of 20455012 in words is "twenty million, four hundred fifty-five thousand, twelve".