20185566196 has 12 divisors (see below), whose sum is σ = 36146246752. Its totient is φ = 9858067128.

The previous prime is 20185566143. The next prime is 20185566197. The reversal of 20185566196 is 69166558102.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185566197) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 58678800 + ... + 58679143.

Almost surely, 2^20185566196 is an apocalyptic number.

It is an amenable number.

20185566196 is a deficient number, since it is larger than the sum of its proper divisors (15960680556).

20185566196 is a wasteful number, since it uses less digits than its factorization.

20185566196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117357990 (or 117357988 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 20185566196 in words is "twenty billion, one hundred eighty-five million, five hundred sixty-six thousand, one hundred ninety-six".