20571609076 has 12 divisors (see below), whose sum is σ = 36001322980. Its totient is φ = 10285516800.

The previous prime is 20571609053. The next prime is 20571609109. The reversal of 20571609076 is 67090617502.

It can be written as a sum of positive squares in 2 ways, for example, as 5435228176 + 15136380900 = 73724^2 + 123030^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 226420 + ... + 303988.

Almost surely, 2^20571609076 is an apocalyptic number.

It is an amenable number.

20571609076 is a deficient number, since it is larger than the sum of its proper divisors (15429713904).

20571609076 is a wasteful number, since it uses less digits than its factorization.

20571609076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143874 (or 143872 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 20571609076 in words is "twenty billion, five hundred seventy-one million, six hundred nine thousand, seventy-six".