20873434140899 has 2 divisors, whose sum is σ = 20873434140900. Its totient is φ = 20873434140898.

The previous prime is 20873434140869. The next prime is 20873434140917. The reversal of 20873434140899 is 99804143437802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20873434140899 - 2²⁴ = 20873417363683 is a prime.

It is not a weakly prime, because it can be changed into another prime (20873434140869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436717070449 + 10436717070450.

It is an arithmetic number, because the mean of its divisors is an integer number (10436717070450).

Almost surely, 2^{20873434140899} is an apocalyptic number.

20873434140899 is a deficient number, since it is larger than the sum of its proper divisors (1).

20873434140899 is an equidigital number, since it uses as much as digits as its factorization.

20873434140899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 20873434140899 in words is "twenty trillion, eight hundred seventy-three billion, four hundred thirty-four million, one hundred forty thousand, eight hundred ninety-nine".