18670201668 has 72 divisors (see below), whose sum is σ = 48136286016. Its totient is φ = 6099412800.

The previous prime is 18670201663. The next prime is 18670201679. The reversal of 18670201668 is 86610207681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18670201661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1962403 + ... + 1971893.

It is an arithmetic number, because the mean of its divisors is an integer number (668559528).

Almost surely, 2^18670201668 is an apocalyptic number.

18670201668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18670201668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24068143008).

18670201668 is an abundant number, since it is smaller than the sum of its proper divisors (29466084348).

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

18670201668 is a wasteful number, since it uses less digits than its factorization.

18670201668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585 (or 10580 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 18670201668 in words is "eighteen billion, six hundred seventy million, two hundred one thousand, six hundred sixty-eight".