20910572168 has 64 divisors (see below), whose sum is σ = 40626273600. Its totient is φ = 10083628800.

The previous prime is 20910572129. The next prime is 20910572201. The reversal of 20910572168 is 86127501902.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19560338 + ... + 19561406.

It is an arithmetic number, because the mean of its divisors is an integer number (634785525).

Almost surely, 2^20910572168 is an apocalyptic number.

It is an amenable number.

20910572168 is a deficient number, since it is larger than the sum of its proper divisors (19715701432).

20910572168 is a wasteful number, since it uses less digits than its factorization.

20910572168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 20910572168 in words is "twenty billion, nine hundred ten million, five hundred seventy-two thousand, one hundred sixty-eight".