19490433601 has 2 divisors, whose sum is σ = 19490433602. Its totient is φ = 19490433600.

The previous prime is 19490433541. The next prime is 19490433617. The reversal of 19490433601 is 10633409491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18872165376 + 618268225 = 137376^2 + 24865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19490433601 is a prime.

It is not a weakly prime, because it can be changed into another prime (19490433661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9745216800 + 9745216801.

It is an arithmetic number, because the mean of its divisors is an integer number (9745216801).

Almost surely, 2^19490433601 is an apocalyptic number.

It is an amenable number.

19490433601 is a deficient number, since it is larger than the sum of its proper divisors (1).

19490433601 is an equidigital number, since it uses as much as digits as its factorization.

19490433601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 19490433601 in words is "nineteen billion, four hundred ninety million, four hundred thirty-three thousand, six hundred one".