19494240967 has 2 divisors, whose sum is σ = 19494240968. Its totient is φ = 19494240966.

The previous prime is 19494240947. The next prime is 19494240979. The reversal of 19494240967 is 76904249491.

It is a strong prime.

It is an emirp because it is prime and its reverse (76904249491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19494240967 - 2¹¹ = 19494238919 is a prime.

It is a super-2 number, since 2×19494240967² (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 (19494240937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747120483 + 9747120484.

It is an arithmetic number, because the mean of its divisors is an integer number (9747120484).

Almost surely, 2^19494240967 is an apocalyptic number.

19494240967 is a deficient number, since it is larger than the sum of its proper divisors (1).

19494240967 is an equidigital number, since it uses as much as digits as its factorization.

19494240967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 19494240967 in words is "nineteen billion, four hundred ninety-four million, two hundred forty thousand, nine hundred sixty-seven".