20145145393123 has 2 divisors, whose sum is σ = 20145145393124. Its totient is φ = 20145145393122.

The previous prime is 20145145393099. The next prime is 20145145393133. The reversal of 20145145393123 is 32139354154102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20145145393123 - 2⁹ = 20145145392611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20145145393123.

It is not a weakly prime, because it can be changed into another prime (20145145393133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072572696561 + 10072572696562.

It is an arithmetic number, because the mean of its divisors is an integer number (10072572696562).

Almost surely, 2^{20145145393123} is an apocalyptic number.

20145145393123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145145393123 is an equidigital number, since it uses as much as digits as its factorization.

20145145393123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 20145145393123 in words is "twenty trillion, one hundred forty-five billion, one hundred forty-five million, three hundred ninety-three thousand, one hundred twenty-three".