818529964020 has 144 divisors (see below), whose sum is σ = 2550442422528. Its totient is φ = 212336743680.

The previous prime is 818529963991. The next prime is 818529964051. The reversal of 818529964020 is 20469925818.

It is a happy number.

818529964020 is a `hidden beast` number, since 8 + 1 + 8 + 529 + 96 + 4 + 0 + 20 = 666.

818529964020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65334997 + ... + 65347523.

It is an arithmetic number, because the mean of its divisors is an integer number (17711405712).

Almost surely, 2^818529964020 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 818529964020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275221211264).

818529964020 is an abundant number, since it is smaller than the sum of its proper divisors (1731912458508).

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

818529964020 is a wasteful number, since it uses less digits than its factorization.

818529964020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22390 (or 22385 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 818529964020 in words is "eight hundred eighteen billion, five hundred twenty-nine million, nine hundred sixty-four thousand, twenty".