20113230231977 has 2 divisors, whose sum is σ = 20113230231978. Its totient is φ = 20113230231976.

The previous prime is 20113230231973. The next prime is 20113230232063. The reversal of 20113230231977 is 77913203231102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14089955888281 + 6023274343696 = 3753659^2 + 2454236^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113230231977 - 2² = 20113230231973 is a prime.

It is not a weakly prime, because it can be changed into another prime (20113230231973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056615115988 + 10056615115989.

It is an arithmetic number, because the mean of its divisors is an integer number (10056615115989).

Almost surely, 2^{20113230231977} is an apocalyptic number.

It is an amenable number.

20113230231977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113230231977 is an equidigital number, since it uses as much as digits as its factorization.

20113230231977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The spelling of 20113230231977 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty million, two hundred thirty-one thousand, nine hundred seventy-seven".