20630253626357 has 2 divisors, whose sum is σ = 20630253626358. Its totient is φ = 20630253626356.

The previous prime is 20630253626317. The next prime is 20630253626363. The reversal of 20630253626357 is 75362635203602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19116403917361 + 1513849708996 = 4372231^2 + 1230386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20630253626357 is a prime.

It is a super-2 number, since 2×20630253626357² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20630253626317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315126813178 + 10315126813179.

It is an arithmetic number, because the mean of its divisors is an integer number (10315126813179).

Almost surely, 2^{20630253626357} is an apocalyptic number.

It is an amenable number.

20630253626357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630253626357 is an equidigital number, since it uses as much as digits as its factorization.

20630253626357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 50.

Adding to 20630253626357 its reverse (75362635203602), we get a palindrome (95992888829959).

The spelling of 20630253626357 in words is "twenty trillion, six hundred thirty billion, two hundred fifty-three million, six hundred twenty-six thousand, three hundred fifty-seven".