19449370455 has 32 divisors (see below), whose sum is σ = 32969389824. Its totient is φ = 9756934656.

The previous prime is 19449370453. The next prime is 19449370483. The reversal of 19449370455 is 55407394491.

It is a happy number.

It is not a de Polignac number, because 19449370455 - 2¹ = 19449370453 is a prime.

It is a super-2 number, since 2×19449370455² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 19449370398 and 19449370407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19449370453) 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 31 ways as a sum of consecutive naturals, for example, 417232 + ... + 461498.

It is an arithmetic number, because the mean of its divisors is an integer number (1030293432).

Almost surely, 2^19449370455 is an apocalyptic number.

19449370455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19449370455 is a deficient number, since it is larger than the sum of its proper divisors (13520019369).

19449370455 is a wasteful number, since it uses less digits than its factorization.

19449370455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46015.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 19449370455 in words is "nineteen billion, four hundred forty-nine million, three hundred seventy thousand, four hundred fifty-five".