19923983 has 4 divisors (see below), whose sum is σ = 21096000. Its totient is φ = 18751968.

The previous prime is 19923977. The next prime is 19924013. The reversal of 19923983 is 38932991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19923983 - 2¹⁴ = 19907599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923923) 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, 585983 + ... + 586016.

It is an arithmetic number, because the mean of its divisors is an integer number (5274000).

Almost surely, 2^19923983 is an apocalyptic number.

19923983 is a deficient number, since it is larger than the sum of its proper divisors (1172017).

19923983 is a wasteful number, since it uses less digits than its factorization.

19923983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172016.

The product of its digits is 104976, while the sum is 44.

The square root of 19923983 is about 4463.6289048262. The cubic root of 19923983 is about 271.0974218891.

It can be divided in two parts, 1992 and 3983, that multiplied together give a triangular number (7934136 = T₃₉₈₃).

The spelling of 19923983 in words is "nineteen million, nine hundred twenty-three thousand, nine hundred eighty-three".