18647560956 has 12 divisors (see below), whose sum is σ = 43510975592. Its totient is φ = 6215853648.

The previous prime is 18647560949. The next prime is 18647560957. The reversal of 18647560956 is 65906574681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18647560896 and 18647560905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18647560957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776981695 + ... + 776981718.

Almost surely, 2^18647560956 is an apocalyptic number.

It is an amenable number.

18647560956 is an abundant number, since it is smaller than the sum of its proper divisors (24863414636).

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

18647560956 is a wasteful number, since it uses less digits than its factorization.

18647560956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553963420 (or 1553963418 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 18647560956 in words is "eighteen billion, six hundred forty-seven million, five hundred sixty thousand, nine hundred fifty-six".