20512217570 has 32 divisors (see below), whose sum is σ = 39777454080. Its totient is φ = 7570825920.

The previous prime is 20512217507. The next prime is 20512217573. The reversal of 20512217570 is 7571221502.

It is not an unprimeable number, because it can be changed into a prime (20512217573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324455 + ... + 382485.

It is an arithmetic number, because the mean of its divisors is an integer number (1243045440).

Almost surely, 2^20512217570 is an apocalyptic number.

20512217570 is a deficient number, since it is larger than the sum of its proper divisors (19265236510).

20512217570 is a wasteful number, since it uses less digits than its factorization.

20512217570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60770.

The product of its (nonzero) digits is 9800, while the sum is 32.

The spelling of 20512217570 in words is "twenty billion, five hundred twelve million, two hundred seventeen thousand, five hundred seventy".