18920410357 has 2 divisors, whose sum is σ = 18920410358. Its totient is φ = 18920410356.

The previous prime is 18920410337. The next prime is 18920410373. The reversal of 18920410357 is 75301402981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11811559761 + 7108850596 = 108681^2 + 84314^2 .

It is a cyclic number.

It is not a de Polignac number, because 18920410357 - 2¹⁵ = 18920377589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18920410337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9460205178 + 9460205179.

It is an arithmetic number, because the mean of its divisors is an integer number (9460205179).

Almost surely, 2^18920410357 is an apocalyptic number.

It is an amenable number.

18920410357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18920410357 is an equidigital number, since it uses as much as digits as its factorization.

18920410357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 18920410357 in words is "eighteen billion, nine hundred twenty million, four hundred ten thousand, three hundred fifty-seven".