20286020401957 has 2 divisors, whose sum is σ = 20286020401958. Its totient is φ = 20286020401956.

The previous prime is 20286020401951. The next prime is 20286020401979. The reversal of 20286020401957 is 75910402068202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17723712682116 + 2562307719841 = 4209954^2 + 1600721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20286020401957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20286020401951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143010200978 + 10143010200979.

It is an arithmetic number, because the mean of its divisors is an integer number (10143010200979).

Almost surely, 2^{20286020401957} is an apocalyptic number.

It is an amenable number.

20286020401957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20286020401957 is an equidigital number, since it uses as much as digits as its factorization.

20286020401957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20286020401957 in words is "twenty trillion, two hundred eighty-six billion, twenty million, four hundred one thousand, nine hundred fifty-seven".