18512029841 has 2 divisors, whose sum is σ = 18512029842. Its totient is φ = 18512029840.

The previous prime is 18512029831. The next prime is 18512029871. The reversal of 18512029841 is 14892021581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18203676241 + 308353600 = 134921^2 + 17560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18512029841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18512029831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9256014920 + 9256014921.

It is an arithmetic number, because the mean of its divisors is an integer number (9256014921).

Almost surely, 2^18512029841 is an apocalyptic number.

It is an amenable number.

18512029841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18512029841 is an equidigital number, since it uses as much as digits as its factorization.

18512029841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 18512029841 in words is "eighteen billion, five hundred twelve million, twenty-nine thousand, eight hundred forty-one".