19091911216 has 40 divisors (see below), whose sum is σ = 42284436480. Its totient is φ = 8180410944.

The previous prime is 19091911213. The next prime is 19091911229. The reversal of 19091911216 is 61211919091.

It is not an unprimeable number, because it can be changed into a prime (19091911213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559905 + ... + 593023.

It is an arithmetic number, because the mean of its divisors is an integer number (1057110912).

Almost surely, 2^19091911216 is an apocalyptic number.

19091911216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19091911216 is an abundant number, since it is smaller than the sum of its proper divisors (23192525264).

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

19091911216 is a wasteful number, since it uses less digits than its factorization.

19091911216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38281 (or 38275 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 40.

The spelling of 19091911216 in words is "nineteen billion, ninety-one million, nine hundred eleven thousand, two hundred sixteen".