19946988369 has 96 divisors (see below), whose sum is σ = 39138816000. Its totient is φ = 9752244480.

The previous prime is 19946988361. The next prime is 19946988371. The reversal of 19946988369 is 96388964991.

It is not a de Polignac number, because 19946988369 - 2³ = 19946988361 is a prime.

It is a super-2 number, since 2×19946988369² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19946988297 and 19946988306.

It is not an unprimeable number, because it can be changed into a prime (19946988361) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 584232 + ... + 617430.

It is an arithmetic number, because the mean of its divisors is an integer number (407696000).

Almost surely, 2^19946988369 is an apocalyptic number.

It is an amenable number.

19946988369 is a deficient number, since it is larger than the sum of its proper divisors (19191827631).

19946988369 is a wasteful number, since it uses less digits than its factorization.

19946988369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33260 (or 33237 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 72.

The spelling of 19946988369 in words is "nineteen billion, nine hundred forty-six million, nine hundred eighty-eight thousand, three hundred sixty-nine".