18970929 has 40 divisors (see below), whose sum is σ = 31363200. Its totient is φ = 11366784.

The previous prime is 18970927. The next prime is 18970933. The reversal of 18970929 is 92907981.

It is not a de Polignac number, because 18970929 - 2¹ = 18970927 is a prime.

It is a super-3 number, since 3×18970929³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18970921) 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 39 ways as a sum of consecutive naturals, for example, 31372 + ... + 31970.

It is an arithmetic number, because the mean of its divisors is an integer number (784080).

Almost surely, 2^18970929 is an apocalyptic number.

It is an amenable number.

18970929 is a deficient number, since it is larger than the sum of its proper divisors (12392271).

18970929 is a wasteful number, since it uses less digits than its factorization.

18970929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 18970929 is about 4355.5629946082. The cubic root of 18970929 is about 266.7040022377.

The spelling of 18970929 in words is "eighteen million, nine hundred seventy thousand, nine hundred twenty-nine".