20184508897 has 12 divisors (see below), whose sum is σ = 23500911216. Its totient is φ = 17285554440.

The previous prime is 20184508891. The next prime is 20184508913. The reversal of 20184508897 is 79880548102.

It is a happy number.

It is not a de Polignac number, because 20184508897 - 2¹⁹ = 20183984609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20184508891) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 128379 + ... + 238432.

It is an arithmetic number, because the mean of its divisors is an integer number (1958409268).

Almost surely, 2^20184508897 is an apocalyptic number.

It is an amenable number.

20184508897 is a deficient number, since it is larger than the sum of its proper divisors (3316402319).

20184508897 is a wasteful number, since it uses less digits than its factorization.

20184508897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367948 (or 367941 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 20184508897 in words is "twenty billion, one hundred eighty-four million, five hundred eight thousand, eight hundred ninety-seven".