19551841149 has 16 divisors (see below), whose sum is σ = 27476926400. Its totient is φ = 12332445696.

The previous prime is 19551841147. The next prime is 19551841157. The reversal of 19551841149 is 94114815591.

It is not a de Polignac number, because 19551841149 - 2¹ = 19551841147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19551841098 and 19551841107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19551841147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179194 + ... + 266859.

It is an arithmetic number, because the mean of its divisors is an integer number (1717307900).

Almost surely, 2^19551841149 is an apocalyptic number.

19551841149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19551841149 is a deficient number, since it is larger than the sum of its proper divisors (7925085251).

19551841149 is a wasteful number, since it uses less digits than its factorization.

19551841149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446844.

The product of its digits is 259200, while the sum is 48.

The spelling of 19551841149 in words is "nineteen billion, five hundred fifty-one million, eight hundred forty-one thousand, one hundred forty-nine".