20418924 has 12 divisors (see below), whose sum is σ = 47644184. Its totient is φ = 6806304.

The previous prime is 20418919. The next prime is 20418941. The reversal of 20418924 is 42981402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20418891 and 20418900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850777 + ... + 850800.

Almost surely, 2^20418924 is an apocalyptic number.

It is an amenable number.

20418924 is an abundant number, since it is smaller than the sum of its proper divisors (27225260).

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

20418924 is a wasteful number, since it uses less digits than its factorization.

20418924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701584 (or 1701582 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20418924 is about 4518.7303526544. The cubic root of 20418924 is about 273.3239054187.

The spelling of 20418924 in words is "twenty million, four hundred eighteen thousand, nine hundred twenty-four".