20523154244 has 12 divisors (see below), whose sum is σ = 35916522768. Its totient is φ = 10261290600.

The previous prime is 20523154243. The next prime is 20523154297. The reversal of 20523154244 is 44245132502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523154244.

It is not an unprimeable number, because it can be changed into a prime (20523154243) 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, 248639 + ... + 320729.

It is an arithmetic number, because the mean of its divisors is an integer number (2993043564).

Almost surely, 2^20523154244 is an apocalyptic number.

It is an amenable number.

20523154244 is a deficient number, since it is larger than the sum of its proper divisors (15393368524).

20523154244 is a wasteful number, since it uses less digits than its factorization.

20523154244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143266 (or 143264 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 20523154244 its reverse (44245132502), we get a palindrome (64768286746).

The spelling of 20523154244 in words is "twenty billion, five hundred twenty-three million, one hundred fifty-four thousand, two hundred forty-four".