20484418 has 16 divisors (see below), whose sum is σ = 31312440. Its totient is φ = 10048896.

The previous prime is 20484407. The next prime is 20484481. The reversal of 20484418 is 81448402.

It can be written as a sum of positive squares in 4 ways, for example, as 18122049 + 2362369 = 4257^2 + 1537^2 .

It is a super-2 number, since 2×20484418² = 839222761597448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20484418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27580 + ... + 28312.

Almost surely, 2^20484418 is an apocalyptic number.

20484418 is a deficient number, since it is larger than the sum of its proper divisors (10828022).

20484418 is a wasteful number, since it uses less digits than its factorization.

20484418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 20484418 is about 4525.9714979217. The cubic root of 20484418 is about 273.6158236833.

It can be divided in two parts, 20484 and 418, that added together give a palindrome (20902).

The spelling of 20484418 in words is "twenty million, four hundred eighty-four thousand, four hundred eighteen".