20185307572 has 12 divisors (see below), whose sum is σ = 35648365060. Its totient is φ = 10000060416.

The previous prime is 20185307567. The next prime is 20185307573. The reversal of 20185307572 is 27570358102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6271689636 + 13913617936 = 79194^2 + 117956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185307573) 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 3 ways as a sum of consecutive naturals, for example, 23147853 + ... + 23148724.

Almost surely, 2^20185307572 is an apocalyptic number.

It is an amenable number.

20185307572 is a deficient number, since it is larger than the sum of its proper divisors (15463057488).

20185307572 is a wasteful number, since it uses less digits than its factorization.

20185307572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46296690 (or 46296688 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 20185307572 in words is "twenty billion, one hundred eighty-five million, three hundred seven thousand, five hundred seventy-two".