18469509434880 has 640 divisors, whose sum is σ = 69173944012800. Its totient is φ = 4116910178304.

The previous prime is 18469509434867. The next prime is 18469509434881. The reversal of 18469509434880 is 8843490596481.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×18469509434880² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469509434881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 349252281 + ... + 349305159.

It is an arithmetic number, because the mean of its divisors is an integer number (108084287520).

Almost surely, 2^{18469509434880} is an apocalyptic number.

18469509434880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18469509434880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34586972006400).

18469509434880 is an abundant number, since it is smaller than the sum of its proper divisors (50704434577920).

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

18469509434880 is an equidigital number, since it uses as much as digits as its factorization.

18469509434880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53074 (or 53058 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 69.

The spelling of 18469509434880 in words is "eighteen trillion, four hundred sixty-nine billion, five hundred nine million, four hundred thirty-four thousand, eight hundred eighty".