19820919910 has 16 divisors (see below), whose sum is σ = 38921079312. Its totient is φ = 7207607200.

The previous prime is 19820919907. The next prime is 19820919917. The reversal of 19820919910 is 1991902891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19820919917) 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 7 ways as a sum of consecutive naturals, for example, 90094981 + ... + 90095200.

It is an arithmetic number, because the mean of its divisors is an integer number (2432567457).

Almost surely, 2^19820919910 is an apocalyptic number.

19820919910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19820919910 is a deficient number, since it is larger than the sum of its proper divisors (19100159402).

19820919910 is a wasteful number, since it uses less digits than its factorization.

19820919910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180190199.

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 19820919910 in words is "nineteen billion, eight hundred twenty million, nine hundred nineteen thousand, nine hundred ten".