20455204 has 24 divisors (see below), whose sum is σ = 44630208. Its totient is φ = 7969440.

The previous prime is 20455181. The next prime is 20455207. The reversal of 20455204 is 40255402.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20455207) 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 7 ways as a sum of consecutive naturals, for example, 32899 + ... + 33514.

It is an arithmetic number, because the mean of its divisors is an integer number (1859592).

Almost surely, 2^20455204 is an apocalyptic number.

It is an amenable number.

20455204 is an abundant number, since it is smaller than the sum of its proper divisors (24175004).

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

20455204 is a wasteful number, since it uses less digits than its factorization.

20455204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66435 (or 66433 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20455204 is about 4522.7429730198. The cubic root of 20455204 is about 273.4856887413.

The spelling of 20455204 in words is "twenty million, four hundred fifty-five thousand, two hundred four".