20892202977187 has 2 divisors, whose sum is σ = 20892202977188. Its totient is φ = 20892202977186.

The previous prime is 20892202977161. The next prime is 20892202977221. The reversal of 20892202977187 is 78177920229802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20892202977187 - 2¹⁹ = 20892202452899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20892202977127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446101488593 + 10446101488594.

It is an arithmetic number, because the mean of its divisors is an integer number (10446101488594).

Almost surely, 2^{20892202977187} is an apocalyptic number.

20892202977187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20892202977187 is an equidigital number, since it uses as much as digits as its factorization.

20892202977187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 20892202977187 in words is "twenty trillion, eight hundred ninety-two billion, two hundred two million, nine hundred seventy-seven thousand, one hundred eighty-seven".