19969363969 has 9 divisors (see below), whose sum is σ = 20084914849. Its totient is φ = 19854476500.

The previous prime is 19969363927. The next prime is 19969363979. The reversal of 19969363969 is 96936396991.

The square root of 19969363969 is 141313.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 19969363969 - 2¹⁵ = 19969331201 is a prime.

It is a super-2 number, since 2×19969363969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19969363898 and 19969363907.

It is not an unprimeable number, because it can be changed into a prime (19969363979) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35469282 + ... + 35469844.

Almost surely, 2^19969363969 is an apocalyptic number.

19969363969 is the 141313-rd square number.

19969363969 is the 70657-th centered octagonal number.

It is an amenable number.

19969363969 is a deficient number, since it is larger than the sum of its proper divisors (115550880).

19969363969 is an frugal number, since it uses more digits than its factorization.

19969363969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 814 counting only the distinct ones).

The product of its digits is 114791256, while the sum is 70.

The spelling of 19969363969 in words is "nineteen billion, nine hundred sixty-nine million, three hundred sixty-three thousand, nine hundred sixty-nine".