18909076 has 12 divisors (see below), whose sum is σ = 33290208. Its totient is φ = 9397592.

The previous prime is 18909067. The next prime is 18909089. The reversal of 18909076 is 67090981.

18909076 = T₃₅₄₉ + T₃₅₅₀ + T₃₅₅₁.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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, 13486 + ... + 14821.

It is an arithmetic number, because the mean of its divisors is an integer number (2774184).

Almost surely, 2^18909076 is an apocalyptic number.

18909076 is the 3551-st centered triangular number.

It is an amenable number.

18909076 is a deficient number, since it is larger than the sum of its proper divisors (14381132).

18909076 is a wasteful number, since it uses less digits than its factorization.

18909076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28478 (or 28476 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 18909076 is about 4348.4567377404. The cubic root of 18909076 is about 266.4138318832.

The spelling of 18909076 in words is "eighteen million, nine hundred nine thousand, seventy-six".