20489084 has 24 divisors (see below), whose sum is σ = 44704128. Its totient is φ = 7982640.

The previous prime is 20489081. The next prime is 20489093. The reversal of 20489084 is 48098402.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489081) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32954 + ... + 33569.

It is an arithmetic number, because the mean of its divisors is an integer number (1862672).

Almost surely, 2^20489084 is an apocalyptic number.

It is an amenable number.

20489084 is an abundant number, since it is smaller than the sum of its proper divisors (24215044).

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

20489084 is a wasteful number, since it uses less digits than its factorization.

20489084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66545 (or 66543 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20489084 is about 4526.4869380127. The cubic root of 20489084 is about 273.6365971074.

The spelling of 20489084 in words is "twenty million, four hundred eighty-nine thousand, eighty-four".