18501821413 has 8 divisors (see below), whose sum is σ = 18776923200. Its totient is φ = 18227962368.

The previous prime is 18501821369. The next prime is 18501821467. The reversal of 18501821413 is 31412810581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18501821413 - 2¹³ = 18501813221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18501825413) 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 in 7 ways as a sum of consecutive naturals, for example, 280668 + ... + 340261.

It is an arithmetic number, because the mean of its divisors is an integer number (2347115400).

Almost surely, 2^18501821413 is an apocalyptic number.

It is an amenable number.

18501821413 is a deficient number, since it is larger than the sum of its proper divisors (275101787).

18501821413 is an equidigital number, since it uses as much as digits as its factorization.

18501821413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621371.

The product of its (nonzero) digits is 7680, while the sum is 34.

The spelling of 18501821413 in words is "eighteen billion, five hundred one million, eight hundred twenty-one thousand, four hundred thirteen".