20212512166 has 64 divisors (see below), whose sum is σ = 38236644864. Its totient is φ = 7784524800.

The previous prime is 20212512143. The next prime is 20212512179. The reversal of 20212512166 is 66121521202.

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 31 ways as a sum of consecutive naturals, for example, 5586390 + ... + 5590006.

It is an arithmetic number, because the mean of its divisors is an integer number (597447576).

Almost surely, 2^20212512166 is an apocalyptic number.

20212512166 is a deficient number, since it is larger than the sum of its proper divisors (18024132698).

20212512166 is a wasteful number, since it uses less digits than its factorization.

20212512166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 20212512166 in words is "twenty billion, two hundred twelve million, five hundred twelve thousand, one hundred sixty-six".