19621443338 has 16 divisors (see below), whose sum is σ = 33648048000. Its totient is φ = 8406368016.

The previous prime is 19621443287. The next prime is 19621443353. The reversal of 19621443338 is 83334412691.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191681 + ... + 275652.

It is an arithmetic number, because the mean of its divisors is an integer number (2103003000).

Almost surely, 2^19621443338 is an apocalyptic number.

19621443338 is a deficient number, since it is larger than the sum of its proper divisors (14026604662).

19621443338 is a wasteful number, since it uses less digits than its factorization.

19621443338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470341.

The product of its digits is 373248, while the sum is 44.

The spelling of 19621443338 in words is "nineteen billion, six hundred twenty-one million, four hundred forty-three thousand, three hundred thirty-eight".