18386722045 has 8 divisors (see below), whose sum is σ = 23361952824. Its totient is φ = 13844120064.

The previous prime is 18386722027. The next prime is 18386722069. The reversal of 18386722045 is 54022768381.

It can be written as a sum of positive squares in 4 ways, for example, as 767345401 + 17619376644 = 27701^2 + 132738^2 .

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 18386722045 - 2²⁷ = 18252504317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18386721986 and 18386722004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108157104 + ... + 108157273.

It is an arithmetic number, because the mean of its divisors is an integer number (2920244103).

Almost surely, 2^18386722045 is an apocalyptic number.

It is an amenable number.

18386722045 is a deficient number, since it is larger than the sum of its proper divisors (4975230779).

18386722045 is a wasteful number, since it uses less digits than its factorization.

18386722045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216314399.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 18386722045 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, forty-five".