18497660356 has 24 divisors (see below), whose sum is σ = 39171517056. Its totient is φ = 7461240960.

The previous prime is 18497660347. The next prime is 18497660359. The reversal of 18497660356 is 65306679481.

It is a junction number, because it is equal to n+sod(n) for n = 18497660297 and 18497660306.

It is not an unprimeable number, because it can be changed into a prime (18497660359) 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 7 ways as a sum of consecutive naturals, for example, 19429840 + ... + 19430791.

It is an arithmetic number, because the mean of its divisors is an integer number (1632146544).

Almost surely, 2^18497660356 is an apocalyptic number.

It is an amenable number.

18497660356 is an abundant number, since it is smaller than the sum of its proper divisors (20673856700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18497660356 is a wasteful number, since it uses less digits than its factorization.

18497660356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38860659 (or 38860657 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 18497660356 in words is "eighteen billion, four hundred ninety-seven million, six hundred sixty thousand, three hundred fifty-six".