19988079 has 8 divisors (see below), whose sum is σ = 27102720. Its totient is φ = 13099416.

The previous prime is 19988041. The next prime is 19988083. The reversal of 19988079 is 97088991.

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

It is not a de Polignac number, because 19988079 - 2⁸ = 19987823 is a prime.

It is a super-2 number, since 2×19988079² = 799046604220482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56287 + ... + 56640.

It is an arithmetic number, because the mean of its divisors is an integer number (3387840).

Almost surely, 2^19988079 is an apocalyptic number.

19988079 is a deficient number, since it is larger than the sum of its proper divisors (7114641).

19988079 is a wasteful number, since it uses less digits than its factorization.

19988079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112989.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 19988079 is about 4470.8029480173. The cubic root of 19988079 is about 271.3878199867.

The spelling of 19988079 in words is "nineteen million, nine hundred eighty-eight thousand, seventy-nine".