18671236146145 has 24 divisors (see below), whose sum is σ = 25151504499072. Its totient is φ = 13290164199840.

The previous prime is 18671236146103. The next prime is 18671236146203. The reversal of 18671236146145 is 54164163217681.

It is a de Polignac number, because none of the positive numbers 2^k-18671236146145 is a prime.

It is a super-2 number, since 2×18671236146145² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328285899 + ... + 328342768.

It is an arithmetic number, because the mean of its divisors is an integer number (1047979354128).

Almost surely, 2^{18671236146145} is an apocalyptic number.

It is an amenable number.

18671236146145 is a deficient number, since it is larger than the sum of its proper divisors (6480268352927).

18671236146145 is a wasteful number, since it uses less digits than its factorization.

18671236146145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656628741 (or 656628730 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 18671236146145 in words is "eighteen trillion, six hundred seventy-one billion, two hundred thirty-six million, one hundred forty-six thousand, one hundred forty-five".