19809926214 has 32 divisors (see below), whose sum is σ = 42696025344. Its totient is φ = 6091291680.

The previous prime is 19809926189. The next prime is 19809926219. The reversal of 19809926214 is 41262990891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19809926219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33817 + ... + 201899.

It is an arithmetic number, because the mean of its divisors is an integer number (1334250792).

Almost surely, 2^19809926214 is an apocalyptic number.

19809926214 is an abundant number, since it is smaller than the sum of its proper divisors (22886099130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19809926214 is a wasteful number, since it uses less digits than its factorization.

19809926214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169612.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 19809926214 in words is "nineteen billion, eight hundred nine million, nine hundred twenty-six thousand, two hundred fourteen".