19962239769 has 6 divisors (see below), whose sum is σ = 28834346346. Its totient is φ = 13308159840.

The previous prime is 19962239761. The next prime is 19962239881. The reversal of 19962239769 is 96793226991.

It can be written as a sum of positive squares in only one way, i.e., 19961451225 + 788544 = 141285^2 + 888^2 .

It is not a de Polignac number, because 19962239769 - 2³ = 19962239761 is a prime.

It is a super-2 number, since 2×19962239769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19962239761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1109013312 + ... + 1109013329.

It is an arithmetic number, because the mean of its divisors is an integer number (4805724391).

Almost surely, 2^19962239769 is an apocalyptic number.

It is an amenable number.

19962239769 is a deficient number, since it is larger than the sum of its proper divisors (8872106577).

19962239769 is a wasteful number, since it uses less digits than its factorization.

19962239769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218026647 (or 2218026644 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The spelling of 19962239769 in words is "nineteen billion, nine hundred sixty-two million, two hundred thirty-nine thousand, seven hundred sixty-nine".