20523012253 has 2 divisors, whose sum is σ = 20523012254. Its totient is φ = 20523012252.

The previous prime is 20523012229. The next prime is 20523012287. The reversal of 20523012253 is 35221032502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12530115844 + 7992896409 = 111938^2 + 89403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20523012253 is a prime.

It is a super-3 number, since 3×20523012253³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20523012053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261506126 + 10261506127.

It is an arithmetic number, because the mean of its divisors is an integer number (10261506127).

Almost surely, 2^20523012253 is an apocalyptic number.

It is an amenable number.

20523012253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523012253 is an equidigital number, since it uses as much as digits as its factorization.

20523012253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20523012253 its reverse (35221032502), we get a palindrome (55744044755).

The spelling of 20523012253 in words is "twenty billion, five hundred twenty-three million, twelve thousand, two hundred fifty-three".