20572390633 has 16 divisors (see below), whose sum is σ = 21397248000. Its totient is φ = 19764661392.

The previous prime is 20572390603. The next prime is 20572390637. The reversal of 20572390633 is 33609327502.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20572390633 is a prime.

It is a super-2 number, since 2×20572390633² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20572390637) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2044228 + ... + 2054266.

It is an arithmetic number, because the mean of its divisors is an integer number (1337328000).

Almost surely, 2^20572390633 is an apocalyptic number.

It is an amenable number.

20572390633 is a deficient number, since it is larger than the sum of its proper divisors (824857367).

20572390633 is a wasteful number, since it uses less digits than its factorization.

20572390633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884.

The product of its (nonzero) digits is 204120, while the sum is 40.

The spelling of 20572390633 in words is "twenty billion, five hundred seventy-two million, three hundred ninety thousand, six hundred thirty-three".