18969608057 has 2 divisors, whose sum is σ = 18969608058. Its totient is φ = 18969608056.

The previous prime is 18969608039. The next prime is 18969608089. The reversal of 18969608057 is 75080696981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17552010256 + 1417597801 = 132484^2 + 37651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18969608057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18969607987 and 18969608005.

It is not a weakly prime, because it can be changed into another prime (18969668057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484804028 + 9484804029.

It is an arithmetic number, because the mean of its divisors is an integer number (9484804029).

Almost surely, 2^18969608057 is an apocalyptic number.

It is an amenable number.

18969608057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969608057 is an equidigital number, since it uses as much as digits as its factorization.

18969608057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 18969608057 in words is "eighteen billion, nine hundred sixty-nine million, six hundred eight thousand, fifty-seven".