20187886622667 has 4 divisors (see below), whose sum is σ = 26917182163560. Its totient is φ = 13458591081776.

The previous prime is 20187886622663. The next prime is 20187886622669. The reversal of 20187886622667 is 76622668878102.

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

It is a cyclic number.

It is not a de Polignac number, because 20187886622667 - 2² = 20187886622663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20187886622663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3364647770442 + ... + 3364647770447.

It is an arithmetic number, because the mean of its divisors is an integer number (6729295540890).

Almost surely, 2^{20187886622667} is an apocalyptic number.

20187886622667 is a deficient number, since it is larger than the sum of its proper divisors (6729295540893).

20187886622667 is an equidigital number, since it uses as much as digits as its factorization.

20187886622667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729295540892.

The product of its (nonzero) digits is 260112384, while the sum is 69.

The spelling of 20187886622667 in words is "twenty trillion, one hundred eighty-seven billion, eight hundred eighty-six million, six hundred twenty-two thousand, six hundred sixty-seven".