18980834 has 8 divisors (see below), whose sum is σ = 28490988. Its totient is φ = 9483840.

The previous prime is 18980813. The next prime is 18980839. The reversal of 18980834 is 43808981.

It can be written as a sum of positive squares in 2 ways, for example, as 16834609 + 2146225 = 4103^2 + 1465^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18980791 and 18980800.

It is not an unprimeable number, because it can be changed into a prime (18980839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054 + ... + 6494.

Almost surely, 2^18980834 is an apocalyptic number.

18980834 is a deficient number, since it is larger than the sum of its proper divisors (9510154).

18980834 is a wasteful number, since it uses less digits than its factorization.

18980834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 18980834 is about 4356.6998978585. The cubic root of 18980834 is about 266.7504108509.

The spelling of 18980834 in words is "eighteen million, nine hundred eighty thousand, eight hundred thirty-four".