18929966 has 48 divisors (see below), whose sum is σ = 34473600. Its totient is φ = 7753680.

The previous prime is 18929923. The next prime is 18929969. The reversal of 18929966 is 66992981.

It is a super-2 number, since 2×18929966² = 716687225522312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18929969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105665 + ... + 105843.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^18929966 is an apocalyptic number.

18929966 is a deficient number, since it is larger than the sum of its proper divisors (15543634).

18929966 is a wasteful number, since it uses less digits than its factorization.

18929966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 234 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 18929966 is about 4350.8580762879. The cubic root of 18929966 is about 266.5119036016.

The spelling of 18929966 in words is "eighteen million, nine hundred twenty-nine thousand, nine hundred sixty-six".