20187667104427 has 4 divisors (see below), whose sum is σ = 20187724759056. Its totient is φ = 20187609449800.

The previous prime is 20187667104389. The next prime is 20187667104457. The reversal of 20187667104427 is 72440176678102.

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 20187667104427 - 2³¹ = 20185519620779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20187667104457) 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, 28298863 + ... + 29003464.

It is an arithmetic number, because the mean of its divisors is an integer number (5046931189764).

Almost surely, 2^{20187667104427} is an apocalyptic number.

20187667104427 is a deficient number, since it is larger than the sum of its proper divisors (57654629).

20187667104427 is an equidigital number, since it uses as much as digits as its factorization.

20187667104427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57654628.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 20187667104427 in words is "twenty trillion, one hundred eighty-seven billion, six hundred sixty-seven million, one hundred four thousand, four hundred twenty-seven".