20455404 has 48 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 6641536.

The previous prime is 20455397. The next prime is 20455417. The reversal of 20455404 is 40455402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114187 + ... + 114365.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^20455404 is an apocalyptic number.

It is an amenable number.

20455404 is an abundant number, since it is smaller than the sum of its proper divisors (28533396).

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

20455404 is a wasteful number, since it uses less digits than its factorization.

20455404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20455404 is about 4522.7650834418. The cubic root of 20455404 is about 273.4865800705.

The spelling of 20455404 in words is "twenty million, four hundred fifty-five thousand, four hundred four".