18500010101849 has 4 divisors (see below), whose sum is σ = 18543953119140. Its totient is φ = 18456067084560.

The previous prime is 18500010101761. The next prime is 18500010101897. The reversal of 18500010101849 is 94810101000581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 334454022400 + 18165556079449 = 578320^2 + 4262107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18500010101849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18500010101149) 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 in 3 ways as a sum of consecutive naturals, for example, 21971508014 + ... + 21971508855.

It is an arithmetic number, because the mean of its divisors is an integer number (4635988279785).

Almost surely, 2^{18500010101849} is an apocalyptic number.

It is an amenable number.

18500010101849 is a deficient number, since it is larger than the sum of its proper divisors (43943017291).

18500010101849 is an equidigital number, since it uses as much as digits as its factorization.

18500010101849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43943017290.

The product of its (nonzero) digits is 11520, while the sum is 38.

The spelling of 18500010101849 in words is "eighteen trillion, five hundred billion, ten million, one hundred one thousand, eight hundred forty-nine".