18666434 has 8 divisors (see below), whose sum is σ = 28171920. Its totient is φ = 9275796.

The previous prime is 18666419. The next prime is 18666443. The reversal of 18666434 is 43466681.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28304 + ... + 28955.

It is an arithmetic number, because the mean of its divisors is an integer number (3521490).

Almost surely, 2^18666434 is an apocalyptic number.

18666434 is a deficient number, since it is larger than the sum of its proper divisors (9505486).

18666434 is a wasteful number, since it uses less digits than its factorization.

18666434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57424.

The product of its digits is 82944, while the sum is 38.

The square root of 18666434 is about 4320.4668729201. The cubic root of 18666434 is about 265.2693783862.

The spelling of 18666434 in words is "eighteen million, six hundred sixty-six thousand, four hundred thirty-four".