20534347332828 has 144 divisors (see below), whose sum is σ = 62830272383424. Its totient is φ = 5520142172160.

The previous prime is 20534347332809. The next prime is 20534347332899. The reversal of 20534347332828 is 82823374343502.

20534347332828 is a `hidden beast` number, since 2 + 0 + 53 + 43 + 473 + 3 + 2 + 82 + 8 = 666.

20534347332828 is digitally balanced in base 5, 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, 13217148 + ... + 14688828.

It is an arithmetic number, because the mean of its divisors is an integer number (436321335996).

Almost surely, 2^{20534347332828} is an apocalyptic number.

20534347332828 is a gapful number since it is divisible by the number (28) 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 20534347332828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31415136191712).

20534347332828 is an abundant number, since it is smaller than the sum of its proper divisors (42295925050596).

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

20534347332828 is a wasteful number, since it uses less digits than its factorization.

20534347332828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474972 (or 1474967 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 54.

The spelling of 20534347332828 in words is "twenty trillion, five hundred thirty-four billion, three hundred forty-seven million, three hundred thirty-two thousand, eight hundred twenty-eight".