18973828569 has 8 divisors (see below), whose sum is σ = 25299168480. Its totient is φ = 12648853856.

The previous prime is 18973828567. The next prime is 18973828591. The reversal of 18973828569 is 96582837981.

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 not a de Polignac number, because 18973828569 - 2¹ = 18973828567 is a prime.

It is a super-2 number, since 2×18973828569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18973828567) 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, 71302 + ... + 207440.

It is an arithmetic number, because the mean of its divisors is an integer number (3162396060).

Almost surely, 2^18973828569 is an apocalyptic number.

It is an amenable number.

18973828569 is a deficient number, since it is larger than the sum of its proper divisors (6325339911).

18973828569 is a wasteful number, since it uses less digits than its factorization.

18973828569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182599.

The product of its digits is 52254720, while the sum is 66.

The spelling of 18973828569 in words is "eighteen billion, nine hundred seventy-three million, eight hundred twenty-eight thousand, five hundred sixty-nine".