20131084 has 6 divisors (see below), whose sum is σ = 35229404. Its totient is φ = 10065540.

The previous prime is 20131081. The next prime is 20131091. The reversal of 20131084 is 48013102.

It is not an unprimeable number, because it can be changed into a prime (20131081) by changing a digit.

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 as a sum of consecutive naturals, namely, 2516382 + ... + 2516389.

Almost surely, 2^20131084 is an apocalyptic number.

It is an amenable number.

20131084 is a deficient number, since it is larger than the sum of its proper divisors (15098320).

20131084 is a wasteful number, since it uses less digits than its factorization.

20131084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032775 (or 5032773 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20131084 is about 4486.7676561195. The cubic root of 20131084 is about 272.0334986136.

Adding to 20131084 its reverse (48013102), we get a palindrome (68144186).

The spelling of 20131084 in words is "twenty million, one hundred thirty-one thousand, eighty-four".