20551125533123 has 2 divisors, whose sum is σ = 20551125533124. Its totient is φ = 20551125533122.

The previous prime is 20551125533051. The next prime is 20551125533153. The reversal of 20551125533123 is 32133552115502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20551125533123 - 2¹⁸ = 20551125270979 is a prime.

It is a super-2 number, since 2×20551125533123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20551125533153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275562766561 + 10275562766562.

It is an arithmetic number, because the mean of its divisors is an integer number (10275562766562).

Almost surely, 2^{20551125533123} is an apocalyptic number.

20551125533123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20551125533123 is an equidigital number, since it uses as much as digits as its factorization.

20551125533123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 38.

Adding to 20551125533123 its reverse (32133552115502), we get a palindrome (52684677648625).

The spelling of 20551125533123 in words is "twenty trillion, five hundred fifty-one billion, one hundred twenty-five million, five hundred thirty-three thousand, one hundred twenty-three".