19254819481 has 2 divisors, whose sum is σ = 19254819482. Its totient is φ = 19254819480.

The previous prime is 19254819461. The next prime is 19254819527. The reversal of 19254819481 is 18491845291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19129379481 + 125440000 = 138309^2 + 11200^2 .

It is an emirp because it is prime and its reverse (18491845291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19254819481 - 2⁹ = 19254818969 is a prime.

It is a super-2 number, since 2×19254819481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19254819461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9627409740 + 9627409741.

It is an arithmetic number, because the mean of its divisors is an integer number (9627409741).

Almost surely, 2^19254819481 is an apocalyptic number.

It is an amenable number.

19254819481 is a deficient number, since it is larger than the sum of its proper divisors (1).

19254819481 is an equidigital number, since it uses as much as digits as its factorization.

19254819481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 52.

The spelling of 19254819481 in words is "nineteen billion, two hundred fifty-four million, eight hundred nineteen thousand, four hundred eighty-one".