19770220973 has 2 divisors, whose sum is σ = 19770220974. Its totient is φ = 19770220972.

The previous prime is 19770220957. The next prime is 19770220999. The reversal of 19770220973 is 37902207791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19757956969 + 12264004 = 140563^2 + 3502^2 .

It is a cyclic number.

It is not a de Polignac number, because 19770220973 - 2⁴ = 19770220957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19770220073) 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, 9885110486 + 9885110487.

It is an arithmetic number, because the mean of its divisors is an integer number (9885110487).

Almost surely, 2^19770220973 is an apocalyptic number.

It is an amenable number.

19770220973 is a deficient number, since it is larger than the sum of its proper divisors (1).

19770220973 is an equidigital number, since it uses as much as digits as its factorization.

19770220973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 333396, while the sum is 47.

The spelling of 19770220973 in words is "nineteen billion, seven hundred seventy million, two hundred twenty thousand, nine hundred seventy-three".