22328727491 has 4 divisors (see below), whose sum is σ = 25518545712. Its totient is φ = 19138909272.

The previous prime is 22328727437. The next prime is 22328727511. The reversal of 22328727491 is 19472782322.

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

It is not a de Polignac number, because 22328727491 - 2¹⁴ = 22328711107 is a prime.

It is a super-3 number, since 3×22328727491³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22328727791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594909100 + ... + 1594909113.

It is an arithmetic number, because the mean of its divisors is an integer number (6379636428).

Almost surely, 2^22328727491 is an apocalyptic number.

22328727491 is a deficient number, since it is larger than the sum of its proper divisors (3189818221).

22328727491 is an equidigital number, since it uses as much as digits as its factorization.

22328727491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189818220.

The product of its digits is 677376, while the sum is 47.

The spelling of 22328727491 in words is "twenty-two billion, three hundred twenty-eight million, seven hundred twenty-seven thousand, four hundred ninety-one".