18747628145 has 8 divisors (see below), whose sum is σ = 22499422056. Its totient is φ = 14996590336.

The previous prime is 18747628019. The next prime is 18747628177. The reversal of 18747628145 is 54182674781.

It can be written as a sum of positive squares in 4 ways, for example, as 2572112656 + 16175515489 = 50716^2 + 127183^2 .

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 18747628145 - 2¹⁴ = 18747611761 is a prime.

It is a super-2 number, since 2×18747628145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132962 + ... + 234891.

It is an arithmetic number, because the mean of its divisors is an integer number (2812427757).

Almost surely, 2^18747628145 is an apocalyptic number.

It is an amenable number.

18747628145 is a deficient number, since it is larger than the sum of its proper divisors (3751793911).

18747628145 is a wasteful number, since it uses less digits than its factorization.

18747628145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378051.

The product of its digits is 3010560, while the sum is 53.

The spelling of 18747628145 in words is "eighteen billion, seven hundred forty-seven million, six hundred twenty-eight thousand, one hundred forty-five".