20305242052 has 6 divisors (see below), whose sum is σ = 35534173598. Its totient is φ = 10152621024.

The previous prime is 20305242049. The next prime is 20305242059. The reversal of 20305242052 is 25024250302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10505430016 + 9799812036 = 102496^2 + 98994^2 .

It is not an unprimeable number, because it can be changed into a prime (20305242059) 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 as a sum of consecutive naturals, namely, 2538155253 + ... + 2538155260.

Almost surely, 2^20305242052 is an apocalyptic number.

It is an amenable number.

20305242052 is a deficient number, since it is larger than the sum of its proper divisors (15228931546).

20305242052 is a wasteful number, since it uses less digits than its factorization.

20305242052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076310517 (or 5076310515 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20305242052 its reverse (25024250302), we get a palindrome (45329492354).

The spelling of 20305242052 in words is "twenty billion, three hundred five million, two hundred forty-two thousand, fifty-two".