19888013 has 8 divisors (see below), whose sum is σ = 20474880. Its totient is φ = 19309680.

The previous prime is 19887979. The next prime is 19888021. The reversal of 19888013 is 31088891.

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

It is a cyclic number.

It is not a de Polignac number, because 19888013 - 2⁶ = 19887949 is a prime.

It is a super-2 number, since 2×19888013² = 791066122176338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19882013) 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, 2756 + ... + 6882.

It is an arithmetic number, because the mean of its divisors is an integer number (2559360).

Almost surely, 2^19888013 is an apocalyptic number.

It is an amenable number.

19888013 is a deficient number, since it is larger than the sum of its proper divisors (586867).

19888013 is an equidigital number, since it uses as much as digits as its factorization.

19888013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 19888013 is about 4459.5978518248. The cubic root of 19888013 is about 270.9341806267.

It can be divided in two parts, 1988 and 8013, that added together give a palindrome (10001).

The spelling of 19888013 in words is "nineteen million, eight hundred eighty-eight thousand, thirteen".