19774087093 has 2 divisors, whose sum is σ = 19774087094. Its totient is φ = 19774087092.

The previous prime is 19774087063. The next prime is 19774087127. The reversal of 19774087093 is 39078047791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18632796004 + 1141291089 = 136502^2 + 33783^2 .

It is a cyclic number.

It is not a de Polignac number, because 19774087093 - 2²⁹ = 19237216181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19774087063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9887043546 + 9887043547.

It is an arithmetic number, because the mean of its divisors is an integer number (9887043547).

Almost surely, 2^19774087093 is an apocalyptic number.

It is an amenable number.

19774087093 is a deficient number, since it is larger than the sum of its proper divisors (1).

19774087093 is an equidigital number, since it uses as much as digits as its factorization.

19774087093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The spelling of 19774087093 in words is "nineteen billion, seven hundred seventy-four million, eighty-seven thousand, ninety-three".