20484609 has 12 divisors (see below), whose sum is σ = 29015184. Its totient is φ = 12852544.

The previous prime is 20484599. The next prime is 20484617. The reversal of 20484609 is 90648402.

It is not a de Polignac number, because 20484609 - 2⁷ = 20484481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20484609.

It is not an unprimeable number, because it can be changed into a prime (20480609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10947 + ... + 12680.

It is an arithmetic number, because the mean of its divisors is an integer number (2417932).

Almost surely, 2^20484609 is an apocalyptic number.

It is an amenable number.

20484609 is a deficient number, since it is larger than the sum of its proper divisors (8530575).

20484609 is a wasteful number, since it uses less digits than its factorization.

20484609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23664 (or 23647 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20484609 is about 4525.9925983148. The cubic root of 20484609 is about 273.6166740932.

The spelling of 20484609 in words is "twenty million, four hundred eighty-four thousand, six hundred nine".