20506084 has 12 divisors (see below), whose sum is σ = 36115324. Its totient is φ = 10187424.

The previous prime is 20506081. The next prime is 20506093. The reversal of 20506084 is 48060502.

It can be written as a sum of positive squares in 2 ways, for example, as 7022500 + 13483584 = 2650^2 + 3672^2 .

It is not an unprimeable number, because it can be changed into a prime (20506081) 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 3 ways as a sum of consecutive naturals, for example, 15699 + ... + 16954.

Almost surely, 2^20506084 is an apocalyptic number.

It is an amenable number.

20506084 is a deficient number, since it is larger than the sum of its proper divisors (15609240).

20506084 is a wasteful number, since it uses less digits than its factorization.

20506084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32814 (or 32812 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20506084 is about 4528.3643846316. The cubic root of 20506084 is about 273.7122558694.

Adding to 20506084 its reverse (48060502), we get a palindrome (68566586).

The spelling of 20506084 in words is "twenty million, five hundred six thousand, eighty-four".