20523246356 has 6 divisors (see below), whose sum is σ = 35915681130. Its totient is φ = 10261623176.

The previous prime is 20523246343. The next prime is 20523246377. The reversal of 20523246356 is 65364232502.

It can be written as a sum of positive squares in only one way, i.e., 10695696400 + 9827549956 = 103420^2 + 99134^2 .

It is a super-3 number, since 3×20523246356³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2565405791 + ... + 2565405798.

It is an arithmetic number, because the mean of its divisors is an integer number (5985946855).

Almost surely, 2^20523246356 is an apocalyptic number.

It is an amenable number.

20523246356 is a deficient number, since it is larger than the sum of its proper divisors (15392434774).

20523246356 is a wasteful number, since it uses less digits than its factorization.

20523246356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130811593 (or 5130811591 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 20523246356 its reverse (65364232502), we get a palindrome (85887478858).

The spelling of 20523246356 in words is "twenty billion, five hundred twenty-three million, two hundred forty-six thousand, three hundred fifty-six".