18341953566 has 16 divisors (see below), whose sum is σ = 38278859904. Its totient is φ = 5848159064.

The previous prime is 18341953547. The next prime is 18341953583. The reversal of 18341953566 is 66535914381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66456216 + ... + 66456491.

It is an arithmetic number, because the mean of its divisors is an integer number (2392428744).

Almost surely, 2^18341953566 is an apocalyptic number.

18341953566 is an abundant number, since it is smaller than the sum of its proper divisors (19936906338).

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

18341953566 is a wasteful number, since it uses less digits than its factorization.

18341953566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132912735.

The product of its digits is 2332800, while the sum is 51.

The spelling of 18341953566 in words is "eighteen billion, three hundred forty-one million, nine hundred fifty-three thousand, five hundred sixty-six".