20572168830 has 32 divisors (see below), whose sum is σ = 49420800000. Its totient is φ = 5480623392.

The previous prime is 20572168807. The next prime is 20572168849. The reversal of 20572168830 is 3886127502.

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 15 ways as a sum of consecutive naturals, for example, 298830 + ... + 361169.

It is an arithmetic number, because the mean of its divisors is an integer number (1544400000).

Almost surely, 2^20572168830 is an apocalyptic number.

20572168830 is an abundant number, since it is smaller than the sum of its proper divisors (28848631170).

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

20572168830 is a wasteful number, since it uses less digits than its factorization.

20572168830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661048.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 20572168830 in words is "twenty billion, five hundred seventy-two million, one hundred sixty-eight thousand, eight hundred thirty".