18705575946 has 16 divisors (see below), whose sum is σ = 38024450208. Its totient is φ = 6132975600.

The previous prime is 18705575939. The next prime is 18705575947. The reversal of 18705575946 is 64957550781.

It is not an unprimeable number, because it can be changed into a prime (18705575947) 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, 25553700 + ... + 25554431.

It is an arithmetic number, because the mean of its divisors is an integer number (2376528138).

Almost surely, 2^18705575946 is an apocalyptic number.

18705575946 is an abundant number, since it is smaller than the sum of its proper divisors (19318874262).

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

18705575946 is a wasteful number, since it uses less digits than its factorization.

18705575946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51108197.

The product of its (nonzero) digits is 10584000, while the sum is 57.

The spelling of 18705575946 in words is "eighteen billion, seven hundred five million, five hundred seventy-five thousand, nine hundred forty-six".