18054311945 has 4 divisors (see below), whose sum is σ = 21665174340. Its totient is φ = 14443449552.

The previous prime is 18054311941. The next prime is 18054311983. The reversal of 18054311945 is 54911345081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54911345081 = 5987 ⋅9171763.

It can be written as a sum of positive squares in 2 ways, for example, as 14387282809 + 3667029136 = 119947^2 + 60556^2 .

It is a cyclic number.

It is not a de Polignac number, because 18054311945 - 2² = 18054311941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18054311941) 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, 1805431190 + ... + 1805431199.

It is an arithmetic number, because the mean of its divisors is an integer number (5416293585).

Almost surely, 2^18054311945 is an apocalyptic number.

It is an amenable number.

18054311945 is a deficient number, since it is larger than the sum of its proper divisors (3610862395).

18054311945 is an equidigital number, since it uses as much as digits as its factorization.

18054311945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610862394.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 18054311945 in words is "eighteen billion, fifty-four million, three hundred eleven thousand, nine hundred forty-five".