19434438770 has 16 divisors (see below), whose sum is σ = 35018034048. Its totient is φ = 7765765680.

The previous prime is 19434438767. The next prime is 19434438847. The reversal of 19434438770 is 7783443491.

It is a happy number.

It is a super-2 number, since 2×19434438770² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991034 + ... + 1010453.

It is an arithmetic number, because the mean of its divisors is an integer number (2188627128).

Almost surely, 2^19434438770 is an apocalyptic number.

19434438770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19434438770 is a deficient number, since it is larger than the sum of its proper divisors (15583595278).

19434438770 is a wasteful number, since it uses less digits than its factorization.

19434438770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002465.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 19434438770 in words is "nineteen billion, four hundred thirty-four million, four hundred thirty-eight thousand, seven hundred seventy".