17866481853 has 16 divisors (see below), whose sum is σ = 25990468416. Its totient is φ = 10826979840.

The previous prime is 17866481837. The next prime is 17866481861. The reversal of 17866481853 is 35818466871.

It is a happy number.

It is not a de Polignac number, because 17866481853 - 2⁴ = 17866481837 is a prime.

It is a super-2 number, since 2×17866481853² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17866481793 and 17866481802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17866481803) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 345325 + ... + 393677.

It is an arithmetic number, because the mean of its divisors is an integer number (1624404276).

Almost surely, 2^17866481853 is an apocalyptic number.

It is an amenable number.

17866481853 is a deficient number, since it is larger than the sum of its proper divisors (8123986563).

17866481853 is a wasteful number, since it uses less digits than its factorization.

17866481853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59564.

The product of its digits is 7741440, while the sum is 57.

The spelling of 17866481853 in words is "seventeen billion, eight hundred sixty-six million, four hundred eighty-one thousand, eight hundred fifty-three".