19090868626439 has 2 divisors, whose sum is σ = 19090868626440. Its totient is φ = 19090868626438.

The previous prime is 19090868626343. The next prime is 19090868626477. The reversal of 19090868626439 is 93462686809091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19090868626439 is a prime.

It is a super-2 number, since 2×19090868626439² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19090868626639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9545434313219 + 9545434313220.

It is an arithmetic number, because the mean of its divisors is an integer number (9545434313220).

Almost surely, 2^{19090868626439} is an apocalyptic number.

19090868626439 is a deficient number, since it is larger than the sum of its proper divisors (1).

19090868626439 is an equidigital number, since it uses as much as digits as its factorization.

19090868626439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241864704, while the sum is 71.

The spelling of 19090868626439 in words is "nineteen trillion, ninety billion, eight hundred sixty-eight million, six hundred twenty-six thousand, four hundred thirty-nine".