20105552053452 has 72 divisors (see below), whose sum is σ = 49849894454976. Its totient is φ = 6305722387712.

The previous prime is 20105552053409. The next prime is 20105552053501. The reversal of 20105552053452 is 25435025550102.

It is a self number, because there is not a number n which added to its sum of digits gives 20105552053452.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10651843 + ... + 12396485.

It is an arithmetic number, because the mean of its divisors is an integer number (692359645208).

Almost surely, 2^{20105552053452} 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 20105552053452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24924947227488).

20105552053452 is an abundant number, since it is smaller than the sum of its proper divisors (29744342401524).

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

20105552053452 is a wasteful number, since it uses less digits than its factorization.

20105552053452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748007 (or 1747988 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 39.

The spelling of 20105552053452 in words is "twenty trillion, one hundred five billion, five hundred fifty-two million, fifty-three thousand, four hundred fifty-two".