19402011269 has 2 divisors, whose sum is σ = 19402011270. Its totient is φ = 19402011268.

The previous prime is 19402011257. The next prime is 19402011283. The reversal of 19402011269 is 96211020491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19150408225 + 251603044 = 138385^2 + 15862^2 .

It is an emirp because it is prime and its reverse (96211020491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19402011269 - 2¹² = 19402007173 is a prime.

It is a super-2 number, since 2×19402011269² (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 (19402011229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9701005634 + 9701005635.

It is an arithmetic number, because the mean of its divisors is an integer number (9701005635).

Almost surely, 2^19402011269 is an apocalyptic number.

It is an amenable number.

19402011269 is a deficient number, since it is larger than the sum of its proper divisors (1).

19402011269 is an equidigital number, since it uses as much as digits as its factorization.

19402011269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 19402011269 in words is "nineteen billion, four hundred two million, eleven thousand, two hundred sixty-nine".