19595479949 has 2 divisors, whose sum is σ = 19595479950. Its totient is φ = 19595479948.

The previous prime is 19595479919. The next prime is 19595479957. The reversal of 19595479949 is 94997459591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13252153924 + 6343326025 = 115118^2 + 79645^2 .

It is a cyclic number.

It is not a de Polignac number, because 19595479949 - 2¹⁶ = 19595414413 is a prime.

It is a super-2 number, since 2×19595479949² (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 (19595479919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9797739974 + 9797739975.

It is an arithmetic number, because the mean of its divisors is an integer number (9797739975).

Almost surely, 2^19595479949 is an apocalyptic number.

It is an amenable number.

19595479949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19595479949 is an equidigital number, since it uses as much as digits as its factorization.

19595479949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165337200, while the sum is 71.

The spelling of 19595479949 in words is "nineteen billion, five hundred ninety-five million, four hundred seventy-nine thousand, nine hundred forty-nine".