18061968 has 20 divisors (see below), whose sum is σ = 46660208. Its totient is φ = 6020640.

The previous prime is 18061963. The next prime is 18061987. The reversal of 18061968 is 86916081.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18061963) 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, 188098 + ... + 188193.

Almost surely, 2^18061968 is an apocalyptic number.

It is an amenable number.

18061968 is an abundant number, since it is smaller than the sum of its proper divisors (28598240).

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

18061968 is a wasteful number, since it uses less digits than its factorization.

18061968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376302 (or 376296 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18061968 is about 4249.9374113038. The cubic root of 18061968 is about 262.3745395929.

The spelling of 18061968 in words is "eighteen million, sixty-one thousand, nine hundred sixty-eight".