19662014350969 has 27 divisors (see below), whose sum is σ = 20569879476237. Its totient is φ = 18793432498848.

The previous prime is 19662014350873. The next prime is 19662014351003. The reversal of 19662014350969 is 96905341026691.

The square root of 19662014350969 is 4434187.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4492547310969 + 15169467040000 = 2119563^2 + 3894800^2 .

It is not a de Polignac number, because 19662014350969 - 2²⁵ = 19661980796537 is a prime.

It is a super-2 number, since 2×19662014350969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19662012350969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13759281547 + ... + 13759282975.

Almost surely, 2^{19662014350969} is an apocalyptic number.

19662014350969 is the 4434187-th square number.

19662014350969 is the 2217094-th centered octagonal number.

It is an amenable number.

19662014350969 is a deficient number, since it is larger than the sum of its proper divisors (907865125268).

19662014350969 is an frugal number, since it uses more digits than its factorization.

19662014350969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 61.

The spelling of 19662014350969 in words is "nineteen trillion, six hundred sixty-two billion, fourteen million, three hundred fifty thousand, nine hundred sixty-nine".