20188993373 has 2 divisors, whose sum is σ = 20188993374. Its totient is φ = 20188993372.

The previous prime is 20188993351. The next prime is 20188993421. The reversal of 20188993373 is 37339988102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10841390884 + 9347602489 = 104122^2 + 96683^2 .

It is a cyclic number.

It is not a de Polignac number, because 20188993373 - 2²⁶ = 20121884509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20188993333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10094496686 + 10094496687.

It is an arithmetic number, because the mean of its divisors is an integer number (10094496687).

Almost surely, 2^20188993373 is an apocalyptic number.

It is an amenable number.

20188993373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20188993373 is an equidigital number, since it uses as much as digits as its factorization.

20188993373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 20188993373 in words is "twenty billion, one hundred eighty-eight million, nine hundred ninety-three thousand, three hundred seventy-three".