19100111020 has 24 divisors (see below), whose sum is σ = 40112830800. Its totient is φ = 7639549632.

The previous prime is 19100110979. The next prime is 19100111033. The reversal of 19100111020 is 2011100191.

It is a junction number, because it is equal to n+sod(n) for n = 19100110985 and 19100111003.

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, 579751 + ... + 611809.

It is an arithmetic number, because the mean of its divisors is an integer number (1671367950).

Almost surely, 2^19100111020 is an apocalyptic number.

19100111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19100111020 is an abundant number, since it is smaller than the sum of its proper divisors (21012719780).

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

19100111020 is a wasteful number, since it uses less digits than its factorization.

19100111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61857 (or 61855 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 19100111020 in words is "nineteen billion, one hundred million, one hundred eleven thousand, twenty".