18751464186121 has 2 divisors, whose sum is σ = 18751464186122. Its totient is φ = 18751464186120.

The previous prime is 18751464186073. The next prime is 18751464186157. The reversal of 18751464186121 is 12168146415781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15272940779721 + 3478523406400 = 3908061^2 + 1865080^2 .

It is a cyclic number.

It is not a de Polignac number, because 18751464186121 - 2³⁵ = 18717104447753 is a prime.

It is not a weakly prime, because it can be changed into another prime (18751464196121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375732093060 + 9375732093061.

It is an arithmetic number, because the mean of its divisors is an integer number (9375732093061).

Almost surely, 2^{18751464186121} is an apocalyptic number.

It is an amenable number.

18751464186121 is a deficient number, since it is larger than the sum of its proper divisors (1).

18751464186121 is an equidigital number, since it uses as much as digits as its factorization.

18751464186121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 55.

The spelling of 18751464186121 in words is "eighteen trillion, seven hundred fifty-one billion, four hundred sixty-four million, one hundred eighty-six thousand, one hundred twenty-one".