19910110010 has 32 divisors (see below), whose sum is σ = 40975234560. Its totient is φ = 6823441152.

The previous prime is 19910109991. The next prime is 19910110019. The reversal of 19910110010 is 1001101991.

It is a happy number.

It is a super-2 number, since 2×19910110010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19910110019) 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, 110351 + ... + 228029.

It is an arithmetic number, because the mean of its divisors is an integer number (1280476080).

Almost surely, 2^19910110010 is an apocalyptic number.

19910110010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19910110010 is an abundant number, since it is smaller than the sum of its proper divisors (21065124550).

19910110010 is a wasteful number, since it uses less digits than its factorization.

19910110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120110.

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 19910110010 in words is "nineteen billion, nine hundred ten million, one hundred ten thousand, ten".