19440971930 has 16 divisors (see below), whose sum is σ = 34997787720. Its totient is φ = 7775491392.

The previous prime is 19440971909. The next prime is 19440971939. The reversal of 19440971930 is 3917904491.

It can be written as a sum of positive squares in 4 ways, for example, as 16692381601 + 2748590329 = 129199^2 + 52427^2 .

It is not an unprimeable number, because it can be changed into a prime (19440971939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17369 + ... + 197948.

Almost surely, 2^19440971930 is an apocalyptic number.

19440971930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19440971930 is a deficient number, since it is larger than the sum of its proper divisors (15556815790).

19440971930 is a wasteful number, since it uses less digits than its factorization.

19440971930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224353.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 19440971930 in words is "nineteen billion, four hundred forty million, nine hundred seventy-one thousand, nine hundred thirty".