19825766473 has 2 divisors, whose sum is σ = 19825766474. Its totient is φ = 19825766472.

The previous prime is 19825766369. The next prime is 19825766479. The reversal of 19825766473 is 37466752891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18875462544 + 950303929 = 137388^2 + 30827^2 .

It is a cyclic number.

It is not a de Polignac number, because 19825766473 - 2⁹ = 19825765961 is a prime.

It is a super-2 number, since 2×19825766473² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19825766479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9912883236 + 9912883237.

It is an arithmetic number, because the mean of its divisors is an integer number (9912883237).

Almost surely, 2^19825766473 is an apocalyptic number.

It is an amenable number.

19825766473 is a deficient number, since it is larger than the sum of its proper divisors (1).

19825766473 is an equidigital number, since it uses as much as digits as its factorization.

19825766473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The spelling of 19825766473 in words is "nineteen billion, eight hundred twenty-five million, seven hundred sixty-six thousand, four hundred seventy-three".