19827929089 has 4 divisors (see below), whose sum is σ = 19891684800. Its totient is φ = 19764173380.

The previous prime is 19827929083. The next prime is 19827929101. The reversal of 19827929089 is 98092972891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19827929089 - 2⁹ = 19827928577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19827929089.

It is not an unprimeable number, because it can be changed into a prime (19827929083) 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, 31877389 + ... + 31878010.

It is an arithmetic number, because the mean of its divisors is an integer number (4972921200).

Almost surely, 2^19827929089 is an apocalyptic number.

It is an amenable number.

19827929089 is a deficient number, since it is larger than the sum of its proper divisors (63755711).

19827929089 is an equidigital number, since it uses as much as digits as its factorization.

19827929089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63755710.

The product of its (nonzero) digits is 11757312, while the sum is 64.

The spelling of 19827929089 in words is "nineteen billion, eight hundred twenty-seven million, nine hundred twenty-nine thousand, eighty-nine".