20484438 has 16 divisors (see below), whose sum is σ = 44120496. Its totient is φ = 6302880.

The previous prime is 20484407. The next prime is 20484481. The reversal of 20484438 is 83448402.

It is a super-2 number, since 2×20484438² = 839224400351688, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20484399 and 20484408.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 131233 + ... + 131388.

It is an arithmetic number, because the mean of its divisors is an integer number (2757531).

Almost surely, 2^20484438 is an apocalyptic number.

20484438 is an abundant number, since it is smaller than the sum of its proper divisors (23636058).

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

20484438 is a wasteful number, since it uses less digits than its factorization.

20484438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262639.

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 20484438 is about 4525.9737073916. The cubic root of 20484438 is about 273.6159127317.

The spelling of 20484438 in words is "twenty million, four hundred eighty-four thousand, four hundred thirty-eight".