20523123304 has 8 divisors (see below), whose sum is σ = 38480856210. Its totient is φ = 10261561648.

The previous prime is 20523123301. The next prime is 20523123323. The reversal of 20523123304 is 40332132502.

It can be written as a sum of positive squares in only one way, i.e., 11459702500 + 9063420804 = 107050^2 + 95202^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20523123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282695199 + ... + 1282695214.

Almost surely, 2^20523123304 is an apocalyptic number.

It is an amenable number.

20523123304 is a deficient number, since it is larger than the sum of its proper divisors (17957732906).

20523123304 is a wasteful number, since it uses less digits than its factorization.

20523123304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565390419 (or 2565390415 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20523123304 its reverse (40332132502), we get a palindrome (60855255806).

The spelling of 20523123304 in words is "twenty billion, five hundred twenty-three million, one hundred twenty-three thousand, three hundred four".