19950481091 has 2 divisors, whose sum is σ = 19950481092. Its totient is φ = 19950481090.

The previous prime is 19950481081. The next prime is 19950481123. The reversal of 19950481091 is 19018405991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19950481091 - 2⁶ = 19950481027 is a prime.

It is not a weakly prime, because it can be changed into another prime (19950481081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9975240545 + 9975240546.

It is an arithmetic number, because the mean of its divisors is an integer number (9975240546).

Almost surely, 2^19950481091 is an apocalyptic number.

19950481091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19950481091 is an equidigital number, since it uses as much as digits as its factorization.

19950481091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 47.

The spelling of 19950481091 in words is "nineteen billion, nine hundred fifty million, four hundred eighty-one thousand, ninety-one".