19419893501 has 2 divisors, whose sum is σ = 19419893502. Its totient is φ = 19419893500.

The previous prime is 19419893443. The next prime is 19419893527. The reversal of 19419893501 is 10539891491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13624725625 + 5795167876 = 116725^2 + 76126^2 .

It is a cyclic number.

It is not a de Polignac number, because 19419893501 - 2¹⁰ = 19419892477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19419893501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19419893201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9709946750 + 9709946751.

It is an arithmetic number, because the mean of its divisors is an integer number (9709946751).

Almost surely, 2^19419893501 is an apocalyptic number.

It is an amenable number.

19419893501 is a deficient number, since it is larger than the sum of its proper divisors (1).

19419893501 is an equidigital number, since it uses as much as digits as its factorization.

19419893501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 19419893501 in words is "nineteen billion, four hundred nineteen million, eight hundred ninety-three thousand, five hundred one".