18541672133401 has 2 divisors, whose sum is σ = 18541672133402. Its totient is φ = 18541672133400.

The previous prime is 18541672133323. The next prime is 18541672133431. The reversal of 18541672133401 is 10433127614581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13520034841600 + 5021637291801 = 3676960^2 + 2240901^2 .

It is a cyclic number.

It is not a de Polignac number, because 18541672133401 - 2⁷ = 18541672133273 is a prime.

It is not a weakly prime, because it can be changed into another prime (18541672133431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9270836066700 + 9270836066701.

It is an arithmetic number, because the mean of its divisors is an integer number (9270836066701).

Almost surely, 2^{18541672133401} is an apocalyptic number.

It is an amenable number.

18541672133401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18541672133401 is an equidigital number, since it uses as much as digits as its factorization.

18541672133401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

Adding to 18541672133401 its reverse (10433127614581), we get a palindrome (28974799747982).

The spelling of 18541672133401 in words is "eighteen trillion, five hundred forty-one billion, six hundred seventy-two million, one hundred thirty-three thousand, four hundred one".