19100020011 has 4 divisors (see below), whose sum is σ = 25466693352. Its totient is φ = 12733346672.

The previous prime is 19100020003. The next prime is 19100020021. The reversal of 19100020011 is 11002000191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19100020011 - 2³ = 19100020003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19100020001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3183336666 + ... + 3183336671.

It is an arithmetic number, because the mean of its divisors is an integer number (6366673338).

Almost surely, 2^19100020011 is an apocalyptic number.

19100020011 is a deficient number, since it is larger than the sum of its proper divisors (6366673341).

19100020011 is an equidigital number, since it uses as much as digits as its factorization.

19100020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366673340.

The product of its (nonzero) digits is 18, while the sum is 15.

The spelling of 19100020011 in words is "nineteen billion, one hundred million, twenty thousand, eleven".