19683993 has 16 divisors (see below), whose sum is σ = 30504960. Its totient is φ = 11056656.

The previous prime is 19683973. The next prime is 19684001. The reversal of 19683993 is 39938691.

It is a happy number.

It is not a de Polignac number, because 19683993 - 2⁸ = 19683737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19683913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6705 + ... + 9182.

It is an arithmetic number, because the mean of its divisors is an integer number (1906560).

Almost surely, 2^19683993 is an apocalyptic number.

It is an amenable number.

19683993 is a deficient number, since it is larger than the sum of its proper divisors (10820967).

19683993 is a wasteful number, since it uses less digits than its factorization.

19683993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15956.

The product of its digits is 314928, while the sum is 48.

The square root of 19683993 is about 4436.6646255943. The cubic root of 19683993 is about 270.0045403900.

The spelling of 19683993 in words is "nineteen million, six hundred eighty-three thousand, nine hundred ninety-three".