20343731186 has 12 divisors (see below), whose sum is σ = 32206212702. Its totient is φ = 9636503904.

The previous prime is 20343731143. The next prime is 20343731197. The reversal of 20343731186 is 68113734302.

It can be written as a sum of positive squares in only one way, i.e., 15729925561 + 4613805625 = 125419^2 + 67925^2 .

It is a Harshad number since it is a multiple of its sum of digits (38).

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 in 5 ways as a sum of consecutive naturals, for example, 14087735 + ... + 14089178.

Almost surely, 2^20343731186 is an apocalyptic number.

20343731186 is a deficient number, since it is larger than the sum of its proper divisors (11862481516).

20343731186 is a wasteful number, since it uses less digits than its factorization.

20343731186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28176953 (or 28176934 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 20343731186 in words is "twenty billion, three hundred forty-three million, seven hundred thirty-one thousand, one hundred eighty-six".