18620448369 has 16 divisors (see below), whose sum is σ = 25690104000. Its totient is φ = 11988700416.

The previous prime is 18620448367. The next prime is 18620448403. The reversal of 18620448369 is 96384402681.

It is not a de Polignac number, because 18620448369 - 2¹ = 18620448367 is a prime.

It is a super-2 number, since 2×18620448369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18620448367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799444 + ... + 822405.

It is an arithmetic number, because the mean of its divisors is an integer number (1605631500).

Almost surely, 2^18620448369 is an apocalyptic number.

It is an amenable number.

18620448369 is a deficient number, since it is larger than the sum of its proper divisors (7069655631).

18620448369 is a wasteful number, since it uses less digits than its factorization.

18620448369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621984.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 18620448369 in words is "eighteen billion, six hundred twenty million, four hundred forty-eight thousand, three hundred sixty-nine".