19557372953 has 2 divisors, whose sum is σ = 19557372954. Its totient is φ = 19557372952.

The previous prime is 19557372941. The next prime is 19557372973. The reversal of 19557372953 is 35927375591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17326983424 + 2230389529 = 131632^2 + 47227^2 .

It is an emirp because it is prime and its reverse (35927375591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19557372953 - 2⁴ = 19557372937 is a prime.

It is not a weakly prime, because it can be changed into another prime (19557372973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9778686476 + 9778686477.

It is an arithmetic number, because the mean of its divisors is an integer number (9778686477).

Almost surely, 2^19557372953 is an apocalyptic number.

It is an amenable number.

19557372953 is a deficient number, since it is larger than the sum of its proper divisors (1).

19557372953 is an equidigital number, since it uses as much as digits as its factorization.

19557372953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8930250, while the sum is 56.

The spelling of 19557372953 in words is "nineteen billion, five hundred fifty-seven million, three hundred seventy-two thousand, nine hundred fifty-three".