18721472751341 has 4 divisors (see below), whose sum is σ = 18721519007772. Its totient is φ = 18721426494912.

The previous prime is 18721472751307. The next prime is 18721472751347. The reversal of 18721472751341 is 14315727412781.

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 10475443623241 + 8246029128100 = 3236579^2 + 2871590^2 .

It is a cyclic number.

It is not a de Polignac number, because 18721472751341 - 2¹⁸ = 18721472489197 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 (18721472751347) 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, 22515710 + ... + 23332383.

It is an arithmetic number, because the mean of its divisors is an integer number (4680379751943).

Almost surely, 2^{18721472751341} is an apocalyptic number.

It is an amenable number.

18721472751341 is a deficient number, since it is larger than the sum of its proper divisors (46256431).

18721472751341 is an equidigital number, since it uses as much as digits as its factorization.

18721472751341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46256430.

The product of its digits is 2634240, while the sum is 53.

The spelling of 18721472751341 in words is "eighteen trillion, seven hundred twenty-one billion, four hundred seventy-two million, seven hundred fifty-one thousand, three hundred forty-one".