19106855509 has 16 divisors (see below), whose sum is σ = 23190800256. Its totient is φ = 15367334400.

The previous prime is 19106855497. The next prime is 19106855533. The reversal of 19106855509 is 90555860191.

It is a cyclic number.

It is not a de Polignac number, because 19106855509 - 2⁵ = 19106855477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19106855539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203152 + ... + 281929.

It is an arithmetic number, because the mean of its divisors is an integer number (1449425016).

Almost surely, 2^19106855509 is an apocalyptic number.

It is an amenable number.

19106855509 is a deficient number, since it is larger than the sum of its proper divisors (4083944747).

19106855509 is a wasteful number, since it uses less digits than its factorization.

19106855509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485436.

The product of its (nonzero) digits is 486000, while the sum is 49.

The spelling of 19106855509 in words is "nineteen billion, one hundred six million, eight hundred fifty-five thousand, five hundred nine".