18401672352867 has 16 divisors (see below), whose sum is σ = 24548496452640. Its totient is φ = 12261315633152.

The previous prime is 18401672352821. The next prime is 18401672352887. The reversal of 18401672352867 is 76825327610481.

It is a cyclic number.

It is not a de Polignac number, because 18401672352867 - 2¹² = 18401672348771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18401672352867.

It is not an unprimeable number, because it can be changed into a prime (18401672352887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114431263 + ... + 114591959.

It is an arithmetic number, because the mean of its divisors is an integer number (1534281028290).

Almost surely, 2^{18401672352867} is an apocalyptic number.

18401672352867 is a deficient number, since it is larger than the sum of its proper divisors (6146824099773).

18401672352867 is a wasteful number, since it uses less digits than its factorization.

18401672352867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180582.

The product of its (nonzero) digits is 27095040, while the sum is 60.

The spelling of 18401672352867 in words is "eighteen trillion, four hundred one billion, six hundred seventy-two million, three hundred fifty-two thousand, eight hundred sixty-seven".