20572164911 has 2 divisors, whose sum is σ = 20572164912. Its totient is φ = 20572164910.

The previous prime is 20572164889. The next prime is 20572164923. The reversal of 20572164911 is 11946127502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20572164911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20572167911) by changing a digit.

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, 10286082455 + 10286082456.

It is an arithmetic number, because the mean of its divisors is an integer number (10286082456).

Almost surely, 2^20572164911 is an apocalyptic number.

20572164911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572164911 is an equidigital number, since it uses as much as digits as its factorization.

20572164911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 20572164911 in words is "twenty billion, five hundred seventy-two million, one hundred sixty-four thousand, nine hundred eleven".