20293918184 has 8 divisors (see below), whose sum is σ = 38051096610. Its totient is φ = 10146959088.

The previous prime is 20293918123. The next prime is 20293918193. The reversal of 20293918184 is 48181939202.

It can be written as a sum of positive squares in only one way, i.e., 19074372100 + 1219546084 = 138110^2 + 34922^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268369879 + ... + 1268369894.

Almost surely, 2^20293918184 is an apocalyptic number.

It is an amenable number.

20293918184 is a deficient number, since it is larger than the sum of its proper divisors (17757178426).

20293918184 is a wasteful number, since it uses less digits than its factorization.

20293918184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536739779 (or 2536739775 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 20293918184 in words is "twenty billion, two hundred ninety-three million, nine hundred eighteen thousand, one hundred eighty-four".