19741703381 has 2 divisors, whose sum is σ = 19741703382. Its totient is φ = 19741703380.

The previous prime is 19741703351. The next prime is 19741703417. The reversal of 19741703381 is 18330714791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18398480881 + 1343222500 = 135641^2 + 36650^2 .

It is an emirp because it is prime and its reverse (18330714791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19741703381 - 2¹⁴ = 19741686997 is a prime.

It is a super-2 number, since 2×19741703381² (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 (19741703351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870851690 + 9870851691.

It is an arithmetic number, because the mean of its divisors is an integer number (9870851691).

Almost surely, 2^19741703381 is an apocalyptic number.

It is an amenable number.

19741703381 is a deficient number, since it is larger than the sum of its proper divisors (1).

19741703381 is an equidigital number, since it uses as much as digits as its factorization.

19741703381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 19741703381 in words is "nineteen billion, seven hundred forty-one million, seven hundred three thousand, three hundred eighty-one".