1900806409819 has 2 divisors, whose sum is σ = 1900806409820. Its totient is φ = 1900806409818.

The previous prime is 1900806409783. The next prime is 1900806409889. The reversal of 1900806409819 is 9189046080091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1900806409819 - 2¹⁷ = 1900806278747 is a prime.

It is a super-2 number, since 2×1900806409819² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1900806409819.

It is not a weakly prime, because it can be changed into another prime (1900806409889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950403204909 + 950403204910.

It is an arithmetic number, because the mean of its divisors is an integer number (950403204910).

Almost surely, 2^{1900806409819} is an apocalyptic number.

1900806409819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900806409819 is an equidigital number, since it uses as much as digits as its factorization.

1900806409819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 1900806409819 in words is "one trillion, nine hundred billion, eight hundred six million, four hundred nine thousand, eight hundred nineteen".