18720371161033 has 4 divisors (see below), whose sum is σ = 18720600470800. Its totient is φ = 18720141851268.

The previous prime is 18720371160983. The next prime is 18720371161057. The reversal of 18720371161033 is 33016117302781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18720371161033 - 2⁴¹ = 16521347905481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18720371161133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114532383 + ... + 114695716.

It is an arithmetic number, because the mean of its divisors is an integer number (4680150117700).

Almost surely, 2^{18720371161033} is an apocalyptic number.

It is an amenable number.

18720371161033 is a deficient number, since it is larger than the sum of its proper divisors (229309767).

18720371161033 is an equidigital number, since it uses as much as digits as its factorization.

18720371161033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229309766.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 18720371161033 in words is "eighteen trillion, seven hundred twenty billion, three hundred seventy-one million, one hundred sixty-one thousand, thirty-three".