18841265413 has 4 divisors (see below), whose sum is σ = 18862750060. Its totient is φ = 18819780768.

The previous prime is 18841265381. The next prime is 18841265437. The reversal of 18841265413 is 31456214881.

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 6551769249 + 12289496164 = 80943^2 + 110858^2 .

It is a cyclic number.

It is not a de Polignac number, because 18841265413 - 2⁵ = 18841265381 is a prime.

It is a super-2 number, since 2×18841265413² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18841265413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18841265713) 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, 10741008 + ... + 10742761.

It is an arithmetic number, because the mean of its divisors is an integer number (4715687515).

Almost surely, 2^18841265413 is an apocalyptic number.

It is an amenable number.

18841265413 is a deficient number, since it is larger than the sum of its proper divisors (21484647).

18841265413 is an equidigital number, since it uses as much as digits as its factorization.

18841265413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21484646.

The product of its digits is 184320, while the sum is 43.

The spelling of 18841265413 in words is "eighteen billion, eight hundred forty-one million, two hundred sixty-five thousand, four hundred thirteen".