19741161989 has 2 divisors, whose sum is σ = 19741161990. Its totient is φ = 19741161988.

The previous prime is 19741161971. The next prime is 19741162061. The reversal of 19741161989 is 98916114791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17358062500 + 2383099489 = 131750^2 + 48817^2 .

It is a cyclic number.

It is not a de Polignac number, because 19741161989 - 2⁸ = 19741161733 is a prime.

It is a super-2 number, since 2×19741161989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19741161389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870580994 + 9870580995.

It is an arithmetic number, because the mean of its divisors is an integer number (9870580995).

Almost surely, 2^19741161989 is an apocalyptic number.

It is an amenable number.

19741161989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19741161989 is an equidigital number, since it uses as much as digits as its factorization.

19741161989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 56.

The spelling of 19741161989 in words is "nineteen billion, seven hundred forty-one million, one hundred sixty-one thousand, nine hundred eighty-nine".