19619813213 has 32 divisors (see below), whose sum is σ = 26789253120. Its totient is φ = 13872922560.

The previous prime is 19619813209. The next prime is 19619813243. The reversal of 19619813213 is 31231891691.

It is not a de Polignac number, because 19619813213 - 2² = 19619813209 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19619813243) 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, 107045 + ... + 225162.

It is an arithmetic number, because the mean of its divisors is an integer number (837164160).

Almost surely, 2^19619813213 is an apocalyptic number.

19619813213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19619813213 is a deficient number, since it is larger than the sum of its proper divisors (7169439907).

19619813213 is a wasteful number, since it uses less digits than its factorization.

19619813213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332297.

The product of its digits is 69984, while the sum is 44.

The spelling of 19619813213 in words is "nineteen billion, six hundred nineteen million, eight hundred thirteen thousand, two hundred thirteen".