18609917548 has 24 divisors (see below), whose sum is σ = 33381442080. Its totient is φ = 9072631680.

The previous prime is 18609917503. The next prime is 18609917549. The reversal of 18609917548 is 84571990681.

It is a super-2 number, since 2×18609917548² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18609917492 and 18609917501.

It is not an unprimeable number, because it can be changed into a prime (18609917549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251473 + ... + 316951.

It is an arithmetic number, because the mean of its divisors is an integer number (1390893420).

Almost surely, 2^18609917548 is an apocalyptic number.

It is an amenable number.

18609917548 is a deficient number, since it is larger than the sum of its proper divisors (14771524532).

18609917548 is a wasteful number, since it uses less digits than its factorization.

18609917548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67257 (or 67255 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 18609917548 in words is "eighteen billion, six hundred nine million, nine hundred seventeen thousand, five hundred forty-eight".