18965372504 has 64 divisors (see below), whose sum is σ = 38860093440. Its totient is φ = 8625075840.

The previous prime is 18965372477. The next prime is 18965372509. The reversal of 18965372504 is 40527356981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18965372509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2120987 + ... + 2129909.

It is an arithmetic number, because the mean of its divisors is an integer number (607188960).

It is a 1-persistent number, because it is pandigital, but 2⋅18965372504 = 37930745008 is not.

Almost surely, 2^18965372504 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 18965372504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19430046720).

18965372504 is an abundant number, since it is smaller than the sum of its proper divisors (19894720936).

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

18965372504 is a wasteful number, since it uses less digits than its factorization.

18965372504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240 (or 9236 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 18965372504 in words is "eighteen billion, nine hundred sixty-five million, three hundred seventy-two thousand, five hundred four".