19324991227 has 4 divisors (see below), whose sum is σ = 19472510376. Its totient is φ = 19177472080.

The previous prime is 19324991221. The next prime is 19324991233. The reversal of 19324991227 is 72219942391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72219942391 = 31 ⋅2329675561.

It is an interprime number because it is at equal distance from previous prime (19324991221) and next prime (19324991233).

It is a cyclic number.

It is not a de Polignac number, because 19324991227 - 2¹⁵ = 19324958459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19324991221) 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, 73759378 + ... + 73759639.

It is an arithmetic number, because the mean of its divisors is an integer number (4868127594).

Almost surely, 2^19324991227 is an apocalyptic number.

19324991227 is a deficient number, since it is larger than the sum of its proper divisors (147519149).

19324991227 is a wasteful number, since it uses less digits than its factorization.

19324991227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147519148.

The product of its digits is 489888, while the sum is 49.

The spelling of 19324991227 in words is "nineteen billion, three hundred twenty-four million, nine hundred ninety-one thousand, two hundred twenty-seven".