20072186 has 4 divisors (see below), whose sum is σ = 30108282. Its totient is φ = 10036092.

The previous prime is 20072183. The next prime is 20072191. The reversal of 20072186 is 68127002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18705625 + 1366561 = 4325^2 + 1169^2 .

It is not an unprimeable number, because it can be changed into a prime (20072183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018045 + ... + 5018048.

Almost surely, 2^20072186 is an apocalyptic number.

20072186 is a deficient number, since it is larger than the sum of its proper divisors (10036096).

20072186 is a wasteful number, since it uses less digits than its factorization.

20072186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036095.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20072186 is about 4480.1993259229. The cubic root of 20072186 is about 271.7679411306.

Adding to 20072186 its reverse (68127002), we get a palindrome (88199188).

The spelling of 20072186 in words is "twenty million, seventy-two thousand, one hundred eighty-six".