18969377369 has 8 divisors (see below), whose sum is σ = 20256510720. Its totient is φ = 17724445200.

The previous prime is 18969377347. The next prime is 18969377423. The reversal of 18969377369 is 96377396981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18969377369 is a prime.

It is a super-2 number, since 2×18969377369² (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 = 18969377299 and 18969377308.

It is not an unprimeable number, because it can be changed into a prime (18969377069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10549367 + ... + 10551164.

It is an arithmetic number, because the mean of its divisors is an integer number (2532063840).

Almost surely, 2^18969377369 is an apocalyptic number.

It is an amenable number.

18969377369 is a deficient number, since it is larger than the sum of its proper divisors (1287133351).

18969377369 is a wasteful number, since it uses less digits than its factorization.

18969377369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100591.

The product of its digits is 92588832, while the sum is 68.

The spelling of 18969377369 in words is "eighteen billion, nine hundred sixty-nine million, three hundred seventy-seven thousand, three hundred sixty-nine".