20190390853 has 2 divisors, whose sum is σ = 20190390854. Its totient is φ = 20190390852.

The previous prime is 20190390841. The next prime is 20190390859. The reversal of 20190390853 is 35809309102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20157752484 + 32638369 = 141978^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 20190390853 - 2¹⁷ = 20190259781 is a prime.

It is a super-4 number, since 4×20190390853⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20190390859) 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, 10095195426 + 10095195427.

It is an arithmetic number, because the mean of its divisors is an integer number (10095195427).

Almost surely, 2^20190390853 is an apocalyptic number.

It is an amenable number.

20190390853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20190390853 is an equidigital number, since it uses as much as digits as its factorization.

20190390853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

Adding to 20190390853 its reverse (35809309102), we get a palindrome (55999699955).

The spelling of 20190390853 in words is "twenty billion, one hundred ninety million, three hundred ninety thousand, eight hundred fifty-three".