18489267193709 has 32 divisors (see below), whose sum is σ = 20201803710816. Its totient is φ = 16819762544640.

The previous prime is 18489267193697. The next prime is 18489267193729. The reversal of 18489267193709 is 90739176298481.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 7869163871209 + 10620103322500 = 2805203^2 + 3258850^2 .

It is a cyclic number.

It is not a de Polignac number, because 18489267193709 - 2³⁶ = 18420547716973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489267193729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601124759 + ... + 601155515.

It is an arithmetic number, because the mean of its divisors is an integer number (631306365963).

Almost surely, 2^{18489267193709} is an apocalyptic number.

It is an amenable number.

18489267193709 is a deficient number, since it is larger than the sum of its proper divisors (1712536517107).

18489267193709 is a wasteful number, since it uses less digits than its factorization.

18489267193709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32865.

The product of its (nonzero) digits is 329204736, while the sum is 74.

The spelling of 18489267193709 in words is "eighteen trillion, four hundred eighty-nine billion, two hundred sixty-seven million, one hundred ninety-three thousand, seven hundred nine".