19740631193 has 2 divisors, whose sum is σ = 19740631194. Its totient is φ = 19740631192.

The previous prime is 19740631177. The next prime is 19740631213. The reversal of 19740631193 is 39113604791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14720483584 + 5020147609 = 121328^2 + 70853^2 .

It is a cyclic number.

It is not a de Polignac number, because 19740631193 - 2⁴ = 19740631177 is a prime.

It is not a weakly prime, because it can be changed into another prime (19740631103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870315596 + 9870315597.

It is an arithmetic number, because the mean of its divisors is an integer number (9870315597).

Almost surely, 2^19740631193 is an apocalyptic number.

It is an amenable number.

19740631193 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740631193 is an equidigital number, since it uses as much as digits as its factorization.

19740631193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 19740631193 in words is "nineteen billion, seven hundred forty million, six hundred thirty-one thousand, one hundred ninety-three".