19988063 has 4 divisors (see below), whose sum is σ = 20107920. Its totient is φ = 19868208.

The previous prime is 19988041. The next prime is 19988083. The reversal of 19988063 is 36088991.

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 19988063 - 2⁶ = 19987999 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 (19988083) 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, 59678 + ... + 60011.

It is an arithmetic number, because the mean of its divisors is an integer number (5026980).

Almost surely, 2^19988063 is an apocalyptic number.

19988063 is a deficient number, since it is larger than the sum of its proper divisors (119857).

19988063 is a wasteful number, since it uses less digits than its factorization.

19988063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119856.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 19988063 is about 4470.8011586292. The cubic root of 19988063 is about 271.3877475735.

The spelling of 19988063 in words is "nineteen million, nine hundred eighty-eight thousand, sixty-three".