20520245512242 has 96 divisors (see below), whose sum is σ = 56165858187840. Its totient is φ = 5518049201280.

The previous prime is 20520245512241. The next prime is 20520245512297. The reversal of 20520245512242 is 24221554202502.

20520245512242 is a `hidden beast` number, since 2 + 0 + 5 + 20 + 24 + 551 + 22 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20520245512197 and 20520245512206.

It is not an unprimeable number, because it can be changed into a prime (20520245512241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228048984 + ... + 228138947.

It is an arithmetic number, because the mean of its divisors is an integer number (585061022790).

Almost surely, 2^{20520245512242} is an apocalyptic number.

20520245512242 is an abundant number, since it is smaller than the sum of its proper divisors (35645612675598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20520245512242 is a wasteful number, since it uses less digits than its factorization.

20520245512242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456187973 (or 456187960 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 20520245512242 its reverse (24221554202502), we get a palindrome (44741799714744).

The spelling of 20520245512242 in words is "twenty trillion, five hundred twenty billion, two hundred forty-five million, five hundred twelve thousand, two hundred forty-two".