19980854 has 8 divisors (see below), whose sum is σ = 29996568. Its totient is φ = 9982000.

The previous prime is 19980823. The next prime is 19980869. The reversal of 19980854 is 45808991.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 647 + ... + 6354.

It is an arithmetic number, because the mean of its divisors is an integer number (3749571).

Almost surely, 2^19980854 is an apocalyptic number.

19980854 is a deficient number, since it is larger than the sum of its proper divisors (10015714).

19980854 is a wasteful number, since it uses less digits than its factorization.

19980854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8430.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 19980854 is about 4469.9948545832. The cubic root of 19980854 is about 271.3551169391.

The spelling of 19980854 in words is "nineteen million, nine hundred eighty thousand, eight hundred fifty-four".