20538457741699 has 2 divisors, whose sum is σ = 20538457741700. Its totient is φ = 20538457741698.

The previous prime is 20538457741693. The next prime is 20538457741757. The reversal of 20538457741699 is 99614775483502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20538457741699 is a prime.

It is not a weakly prime, because it can be changed into another prime (20538457741693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10269228870849 + 10269228870850.

It is an arithmetic number, because the mean of its divisors is an integer number (10269228870850).

It is a 1-persistent number, because it is pandigital, but 2⋅20538457741699 = 41076915483398 is not.

Almost surely, 2^{20538457741699} is an apocalyptic number.

20538457741699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20538457741699 is an equidigital number, since it uses as much as digits as its factorization.

20538457741699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 457228800, while the sum is 70.

The spelling of 20538457741699 in words is "twenty trillion, five hundred thirty-eight billion, four hundred fifty-seven million, seven hundred forty-one thousand, six hundred ninety-nine".