19062491881 has 2 divisors, whose sum is σ = 19062491882. Its totient is φ = 19062491880.

The previous prime is 19062491879. The next prime is 19062491909. The reversal of 19062491881 is 18819426091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11617390656 + 7445101225 = 107784^2 + 86285^2 .

It is a cyclic number.

It is not a de Polignac number, because 19062491881 - 2¹ = 19062491879 is a prime.

It is a super-2 number, since 2×19062491881² (a number of 21 digits) contains 22 as substring.

Together with 19062491879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19062491281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9531245940 + 9531245941.

It is an arithmetic number, because the mean of its divisors is an integer number (9531245941).

Almost surely, 2^19062491881 is an apocalyptic number.

It is an amenable number.

19062491881 is a deficient number, since it is larger than the sum of its proper divisors (1).

19062491881 is an equidigital number, since it uses as much as digits as its factorization.

19062491881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 19062491881 in words is "nineteen billion, sixty-two million, four hundred ninety-one thousand, eight hundred eighty-one".