20145004184 has 8 divisors (see below), whose sum is σ = 37771882860. Its totient is φ = 10072502088.

The previous prime is 20145004091. The next prime is 20145004213. The reversal of 20145004184 is 48140054102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259062754 + ... + 1259062769.

Almost surely, 2^20145004184 is an apocalyptic number.

It is an amenable number.

20145004184 is a deficient number, since it is larger than the sum of its proper divisors (17626878676).

20145004184 is a wasteful number, since it uses less digits than its factorization.

20145004184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518125529 (or 2518125525 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 20145004184 its reverse (48140054102), we get a palindrome (68285058286).

The spelling of 20145004184 in words is "twenty billion, one hundred forty-five million, four thousand, one hundred eighty-four".