19111192020 has 36 divisors (see below), whose sum is σ = 57970616340. Its totient is φ = 5096317824.

The previous prime is 19111192003. The next prime is 19111192043. The reversal of 19111192020 is 2029111191.

It can be written as a sum of positive squares in 2 ways, for example, as 2830452804 + 16280739216 = 53202^2 + 127596^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53086465 + ... + 53086824.

Almost surely, 2^19111192020 is an apocalyptic number.

19111192020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19111192020 is an abundant number, since it is smaller than the sum of its proper divisors (38859424320).

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

19111192020 is a wasteful number, since it uses less digits than its factorization.

19111192020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106173304 (or 106173299 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 19111192020 in words is "nineteen billion, one hundred eleven million, one hundred ninety-two thousand, twenty".