20418884 has 12 divisors (see below), whose sum is σ = 35800464. Its totient is φ = 10190184.

The previous prime is 20418883. The next prime is 20418889. The reversal of 20418884 is 48881402.

It is not an unprimeable number, because it can be changed into a prime (20418883) 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, 2282 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (2983372).

Almost surely, 2^20418884 is an apocalyptic number.

It is an amenable number.

20418884 is a deficient number, since it is larger than the sum of its proper divisors (15381580).

20418884 is a wasteful number, since it uses less digits than its factorization.

20418884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634 (or 9632 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 20418884 is about 4518.7259266302. The cubic root of 20418884 is about 273.3237269411.

The spelling of 20418884 in words is "twenty million, four hundred eighteen thousand, eight hundred eighty-four".