20572666676 has 6 divisors (see below), whose sum is σ = 36002166690. Its totient is φ = 10286333336.

The previous prime is 20572666663. The next prime is 20572666693. The reversal of 20572666676 is 67666627502.

It can be written as a sum of positive squares in only one way, i.e., 16364549776 + 4208116900 = 127924^2 + 64870^2 .

It is a super-2 number, since 2×20572666676² (a number of 21 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 2571583331 + ... + 2571583338.

It is an arithmetic number, because the mean of its divisors is an integer number (6000361115).

Almost surely, 2^20572666676 is an apocalyptic number.

It is an amenable number.

20572666676 is a deficient number, since it is larger than the sum of its proper divisors (15429500014).

20572666676 is a wasteful number, since it uses less digits than its factorization.

20572666676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143166673 (or 5143166671 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 20572666676 in words is "twenty billion, five hundred seventy-two million, six hundred sixty-six thousand, six hundred seventy-six".