19570902797 has 2 divisors, whose sum is σ = 19570902798. Its totient is φ = 19570902796.

The previous prime is 19570902787. The next prime is 19570902833. The reversal of 19570902797 is 79720907591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13263207556 + 6307695241 = 115166^2 + 79421^2 .

It is a cyclic number.

It is not a de Polignac number, because 19570902797 - 2¹² = 19570898701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19570902787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9785451398 + 9785451399.

It is an arithmetic number, because the mean of its divisors is an integer number (9785451399).

Almost surely, 2^19570902797 is an apocalyptic number.

It is an amenable number.

19570902797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19570902797 is an equidigital number, since it uses as much as digits as its factorization.

19570902797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2500470, while the sum is 56.

The spelling of 19570902797 in words is "nineteen billion, five hundred seventy million, nine hundred two thousand, seven hundred ninety-seven".