19988321349 has 16 divisors (see below), whose sum is σ = 26845886592. Its totient is φ = 13228362048.

The previous prime is 19988321341. The next prime is 19988321357. The reversal of 19988321349 is 94312388991.

It is an interprime number because it is at equal distance from previous prime (19988321341) and next prime (19988321357).

It is not a de Polignac number, because 19988321349 - 2³ = 19988321341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988321341) 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, 361467 + ... + 413079.

It is an arithmetic number, because the mean of its divisors is an integer number (1677867912).

Almost surely, 2^19988321349 is an apocalyptic number.

It is an amenable number.

19988321349 is a deficient number, since it is larger than the sum of its proper divisors (6857565243).

19988321349 is a wasteful number, since it uses less digits than its factorization.

19988321349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52556.

The product of its digits is 3359232, while the sum is 57.

The spelling of 19988321349 in words is "nineteen billion, nine hundred eighty-eight million, three hundred twenty-one thousand, three hundred forty-nine".