20572757572 has 6 divisors (see below), whose sum is σ = 36002325758. Its totient is φ = 10286378784.

The previous prime is 20572757563. The next prime is 20572757617. The reversal of 20572757572 is 27575727502.

It can be written as a sum of positive squares in only one way, i.e., 18611507776 + 1961249796 = 136424^2 + 44286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571594693 + ... + 2571594700.

Almost surely, 2^20572757572 is an apocalyptic number.

It is an amenable number.

20572757572 is a deficient number, since it is larger than the sum of its proper divisors (15429568186).

20572757572 is a wasteful number, since it uses less digits than its factorization.

20572757572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143189397 (or 5143189395 counting only the distinct ones).

The product of its (nonzero) digits is 2401000, while the sum is 49.

The spelling of 20572757572 in words is "twenty billion, five hundred seventy-two million, seven hundred fifty-seven thousand, five hundred seventy-two".