19209523827 has 16 divisors (see below), whose sum is σ = 27605060000. Its totient is φ = 11811750912.

The previous prime is 19209523799. The next prime is 19209523867. The reversal of 19209523827 is 72832590291.

It is not a de Polignac number, because 19209523827 - 2⁷ = 19209523699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19209523867) 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, 148468 + ... + 245889.

It is an arithmetic number, because the mean of its divisors is an integer number (1725316250).

Almost surely, 2^19209523827 is an apocalyptic number.

19209523827 is a deficient number, since it is larger than the sum of its proper divisors (8395536173).

19209523827 is a wasteful number, since it uses less digits than its factorization.

19209523827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395622.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 19209523827 in words is "nineteen billion, two hundred nine million, five hundred twenty-three thousand, eight hundred twenty-seven".