20725313186 has 8 divisors (see below), whose sum is σ = 31221395244. Its totient is φ = 10318181440.

The previous prime is 20725313171. The next prime is 20725313209. The reversal of 20725313186 is 68131352702.

It can be written as a sum of positive squares in 2 ways, for example, as 20701742161 + 23571025 = 143881^2 + 4855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22236995 + ... + 22237926.

Almost surely, 2^20725313186 is an apocalyptic number.

20725313186 is a deficient number, since it is larger than the sum of its proper divisors (10496082058).

20725313186 is a wasteful number, since it uses less digits than its factorization.

20725313186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44475156.

The product of its (nonzero) digits is 60480, while the sum is 38.

Adding to 20725313186 its reverse (68131352702), we get a palindrome (88856665888).

The spelling of 20725313186 in words is "twenty billion, seven hundred twenty-five million, three hundred thirteen thousand, one hundred eighty-six".