18969604224 has 128 divisors (see below), whose sum is σ = 53456241600. Its totient is φ = 5939625984.

The previous prime is 18969604219. The next prime is 18969604229. The reversal of 18969604224 is 42240696981.

It is an interprime number because it is at equal distance from previous prime (18969604219) and next prime (18969604229).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18969604229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3711879 + ... + 3716985.

Almost surely, 2^18969604224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18969604224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26728120800).

18969604224 is an abundant number, since it is smaller than the sum of its proper divisors (34486637376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18969604224 is a wasteful number, since it uses less digits than its factorization.

18969604224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 18969604224 in words is "eighteen billion, nine hundred sixty-nine million, six hundred four thousand, two hundred twenty-four".