18469417646 has 16 divisors (see below), whose sum is σ = 28701075840. Its totient is φ = 8904543840.

The previous prime is 18469417619. The next prime is 18469417649. The reversal of 18469417646 is 64671496481.

It is a super-2 number, since 2×18469417646² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18469417591 and 18469417600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469417649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 520541 + ... + 554888.

It is an arithmetic number, because the mean of its divisors is an integer number (1793817240).

Almost surely, 2^18469417646 is an apocalyptic number.

18469417646 is a deficient number, since it is larger than the sum of its proper divisors (10231658194).

18469417646 is a wasteful number, since it uses less digits than its factorization.

18469417646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075739.

The product of its digits is 6967296, while the sum is 56.

The spelling of 18469417646 in words is "eighteen billion, four hundred sixty-nine million, four hundred seventeen thousand, six hundred forty-six".