220671739186 has 4 divisors (see below), whose sum is σ = 331007608782. Its totient is φ = 110335869592.

The previous prime is 220671739147. The next prime is 220671739217. The reversal of 220671739186 is 681937176022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 681937176022 = 2 ⋅340968588011.

It can be written as a sum of positive squares in only one way, i.e., 204787926225 + 15883812961 = 452535^2 + 126031^2 .

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 as a sum of consecutive naturals, namely, 55167934795 + ... + 55167934798.

Almost surely, 2^220671739186 is an apocalyptic number.

220671739186 is a deficient number, since it is larger than the sum of its proper divisors (110335869596).

220671739186 is a wasteful number, since it uses less digits than its factorization.

220671739186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110335869595.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 220671739186 in words is "two hundred twenty billion, six hundred seventy-one million, seven hundred thirty-nine thousand, one hundred eighty-six".