20510822656 has 27 divisors (see below), whose sum is σ = 40946099383. Its totient is φ = 10254265600.

The previous prime is 20510822641. The next prime is 20510822687. The reversal of 20510822656 is 65622801502.

The square root of 20510822656 is 143216.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2286981 + ... + 2295931.

Almost surely, 2^20510822656 is an apocalyptic number.

20510822656 is the 143216-th square number.

It is an amenable number.

20510822656 is a deficient number, since it is larger than the sum of its proper divisors (20435276727).

20510822656 is an frugal number, since it uses more digits than its factorization.

20510822656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17918 (or 8953 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 20510822656 in words is "twenty billion, five hundred ten million, eight hundred twenty-two thousand, six hundred fifty-six".