19387950941 has 2 divisors, whose sum is σ = 19387950942. Its totient is φ = 19387950940.

The previous prime is 19387950919. The next prime is 19387950977. The reversal of 19387950941 is 14905978391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17168598841 + 2219352100 = 131029^2 + 47110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19387950941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19387950991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9693975470 + 9693975471.

It is an arithmetic number, because the mean of its divisors is an integer number (9693975471).

Almost surely, 2^19387950941 is an apocalyptic number.

It is an amenable number.

19387950941 is a deficient number, since it is larger than the sum of its proper divisors (1).

19387950941 is an equidigital number, since it uses as much as digits as its factorization.

19387950941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 19387950941 in words is "nineteen billion, three hundred eighty-seven million, nine hundred fifty thousand, nine hundred forty-one".