20085878292437 has 2 divisors, whose sum is σ = 20085878292438. Its totient is φ = 20085878292436.

The previous prime is 20085878292409. The next prime is 20085878292481. The reversal of 20085878292437 is 73429287858002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10272031410001 + 9813846882436 = 3205001^2 + 3132706^2 .

It is a cyclic number.

It is not a de Polignac number, because 20085878292437 - 2²² = 20085874098133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20085878292497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042939146218 + 10042939146219.

It is an arithmetic number, because the mean of its divisors is an integer number (10042939146219).

Almost surely, 2^{20085878292437} is an apocalyptic number.

It is an amenable number.

20085878292437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085878292437 is an equidigital number, since it uses as much as digits as its factorization.

20085878292437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108380160, while the sum is 65.

The spelling of 20085878292437 in words is "twenty trillion, eighty-five billion, eight hundred seventy-eight million, two hundred ninety-two thousand, four hundred thirty-seven".