18672929 has 8 divisors (see below), whose sum is σ = 20658240. Its totient is φ = 16735600.

The previous prime is 18672923. The next prime is 18672931. The reversal of 18672929 is 92927681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18672929 - 2¹² = 18668833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18672929.

It is not an unprimeable number, because it can be changed into a prime (18672923) 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, 11174 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (2582280).

Almost surely, 2^18672929 is an apocalyptic number.

It is an amenable number.

18672929 is a deficient number, since it is larger than the sum of its proper divisors (1985311).

18672929 is a wasteful number, since it uses less digits than its factorization.

18672929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23991.

The product of its digits is 108864, while the sum is 44.

The square root of 18672929 is about 4321.2184624247. The cubic root of 18672929 is about 265.3001417128.

The spelling of 18672929 in words is "eighteen million, six hundred seventy-two thousand, nine hundred twenty-nine".