20885357572 has 24 divisors (see below), whose sum is σ = 37751447552. Its totient is φ = 10099641600.

The previous prime is 20885357543. The next prime is 20885357579. The reversal of 20885357572 is 27575358802.

It is not an unprimeable number, because it can be changed into a prime (20885357579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155572 + ... + 256852.

Almost surely, 2^20885357572 is an apocalyptic number.

It is an amenable number.

20885357572 is a deficient number, since it is larger than the sum of its proper divisors (16866089980).

20885357572 is a wasteful number, since it uses less digits than its factorization.

20885357572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102979 (or 102977 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 20885357572 in words is "twenty billion, eight hundred eighty-five million, three hundred fifty-seven thousand, five hundred seventy-two".