20436307267157 has 2 divisors, whose sum is σ = 20436307267158. Its totient is φ = 20436307267156.

The previous prime is 20436307267153. The next prime is 20436307267219. The reversal of 20436307267157 is 75176270363402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16692446038321 + 3743861228836 = 4085639^2 + 1934906^2 .

It is a cyclic number.

It is not a de Polignac number, because 20436307267157 - 2² = 20436307267153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20436307267099 and 20436307267108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20436307267153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218153633578 + 10218153633579.

It is an arithmetic number, because the mean of its divisors is an integer number (10218153633579).

Almost surely, 2^{20436307267157} is an apocalyptic number.

It is an amenable number.

20436307267157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436307267157 is an equidigital number, since it uses as much as digits as its factorization.

20436307267157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 53.

The spelling of 20436307267157 in words is "twenty trillion, four hundred thirty-six billion, three hundred seven million, two hundred sixty-seven thousand, one hundred fifty-seven".