17954745685 has 16 divisors (see below), whose sum is σ = 22765944960. Its totient is φ = 13556047680.

The previous prime is 17954745667. The next prime is 17954745709. The reversal of 17954745685 is 58654745971.

It is a de Polignac number, because none of the positive numbers 2^k-17954745685 is a prime.

It is a super-2 number, since 2×17954745685² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334326 + ... + 384295.

It is an arithmetic number, because the mean of its divisors is an integer number (1422871560).

Almost surely, 2^17954745685 is an apocalyptic number.

It is an amenable number.

17954745685 is a deficient number, since it is larger than the sum of its proper divisors (4811199275).

17954745685 is a wasteful number, since it uses less digits than its factorization.

17954745685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718908.

The product of its digits is 42336000, while the sum is 61.

The spelling of 17954745685 in words is "seventeen billion, nine hundred fifty-four million, seven hundred forty-five thousand, six hundred eighty-five".