18122952473909 has 8 divisors (see below), whose sum is σ = 19378998686808. Its totient is φ = 16888016281600.

The previous prime is 18122952473851. The next prime is 18122952473959. The reversal of 18122952473909 is 90937425922181.

It can be written as a sum of positive squares in 4 ways, for example, as 14688991394884 + 3433961079025 = 3832622^2 + 1853095^2 .

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 18122952473909 - 2¹⁶ = 18122952408373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122952473959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5277503372 + ... + 5277506805.

It is an arithmetic number, because the mean of its divisors is an integer number (2422374835851).

Almost surely, 2^{18122952473909} is an apocalyptic number.

It is an amenable number.

18122952473909 is a deficient number, since it is larger than the sum of its proper divisors (1256046212899).

18122952473909 is a wasteful number, since it uses less digits than its factorization.

18122952473909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555010295.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 18122952473909 in words is "eighteen trillion, one hundred twenty-two billion, nine hundred fifty-two million, four hundred seventy-three thousand, nine hundred nine".