19450507969 has 2 divisors, whose sum is σ = 19450507970. Its totient is φ = 19450507968.

The previous prime is 19450507931. The next prime is 19450507981. The reversal of 19450507969 is 96970505491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10005000625 + 9445507344 = 100025^2 + 97188^2 .

It is a cyclic number.

It is not a de Polignac number, because 19450507969 - 2¹⁵ = 19450475201 is a prime.

It is a super-2 number, since 2×19450507969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19450507169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9725253984 + 9725253985.

It is an arithmetic number, because the mean of its divisors is an integer number (9725253985).

Almost surely, 2^19450507969 is an apocalyptic number.

It is an amenable number.

19450507969 is a deficient number, since it is larger than the sum of its proper divisors (1).

19450507969 is an equidigital number, since it uses as much as digits as its factorization.

19450507969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 19450507969 in words is "nineteen billion, four hundred fifty million, five hundred seven thousand, nine hundred sixty-nine".