19291091933 has 2 divisors, whose sum is σ = 19291091934. Its totient is φ = 19291091932.

The previous prime is 19291091927. The next prime is 19291091957. The reversal of 19291091933 is 33919019291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15548344249 + 3742747684 = 124693^2 + 61178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19291091933 is a prime.

It is a super-4 number, since 4×19291091933⁴ (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 (19291091983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9645545966 + 9645545967.

It is an arithmetic number, because the mean of its divisors is an integer number (9645545967).

Almost surely, 2^19291091933 is an apocalyptic number.

It is an amenable number.

19291091933 is a deficient number, since it is larger than the sum of its proper divisors (1).

19291091933 is an equidigital number, since it uses as much as digits as its factorization.

19291091933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 47.

The spelling of 19291091933 in words is "nineteen billion, two hundred ninety-one million, ninety-one thousand, nine hundred thirty-three".