20065581570 has 32 divisors (see below), whose sum is σ = 50251197312. Its totient is φ = 5118177152.

The previous prime is 20065581539. The next prime is 20065581607. The reversal of 20065581570 is 7518556002.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 14539587 + ... + 14540966.

It is an arithmetic number, because the mean of its divisors is an integer number (1570349916).

Almost surely, 2^20065581570 is an apocalyptic number.

20065581570 is an abundant number, since it is smaller than the sum of its proper divisors (30185615742).

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

20065581570 is a wasteful number, since it uses less digits than its factorization.

20065581570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29080586.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 20065581570 in words is "twenty billion, sixty-five million, five hundred eighty-one thousand, five hundred seventy".