19983013 has 4 divisors (see below), whose sum is σ = 19991968. Its totient is φ = 19974060.

The previous prime is 19983011. The next prime is 19983043. The reversal of 19983013 is 31038991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19983013 - 2¹ = 19983011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19983013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19983011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (4997992).

Almost surely, 2^19983013 is an apocalyptic number.

It is an amenable number.

19983013 is a deficient number, since it is larger than the sum of its proper divisors (8955).

19983013 is an equidigital number, since it uses as much as digits as its factorization.

19983013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8954.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 19983013 is about 4470.2363472192. The cubic root of 19983013 is about 271.3648902050.

The spelling of 19983013 in words is "nineteen million, nine hundred eighty-three thousand, thirteen".