20205506070 has 96 divisors (see below), whose sum is σ = 53836054272. Its totient is φ = 5254998336.

The previous prime is 20205506063. The next prime is 20205506093. The reversal of 20205506070 is 7060550202.

20205506070 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 5 + 50 + 607 + 0 = 666.

20205506070 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 2871897 + ... + 2878923.

It is an arithmetic number, because the mean of its divisors is an integer number (560792232).

Almost surely, 2^20205506070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20205506070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26918027136).

20205506070 is an abundant number, since it is smaller than the sum of its proper divisors (33630548202).

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

20205506070 is a wasteful number, since it uses less digits than its factorization.

20205506070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826 (or 7823 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The spelling of 20205506070 in words is "twenty billion, two hundred five million, five hundred six thousand, seventy".