21893828831 has 8 divisors (see below), whose sum is σ = 25218539520. Its totient is φ = 18618373368.

The previous prime is 21893828773. The next prime is 21893828837. The reversal of 21893828831 is 13882839812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21893828831 is a prime.

It is a super-2 number, since 2×21893828831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21893828837) 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 7 ways as a sum of consecutive naturals, for example, 12312851 + ... + 12314628.

It is an arithmetic number, because the mean of its divisors is an integer number (3152317440).

Almost surely, 2^21893828831 is an apocalyptic number.

21893828831 is a deficient number, since it is larger than the sum of its proper divisors (3324710689).

21893828831 is a wasteful number, since it uses less digits than its factorization.

21893828831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24627613.

The product of its digits is 1327104, while the sum is 53.

The spelling of 21893828831 in words is "twenty-one billion, eight hundred ninety-three million, eight hundred twenty-eight thousand, eight hundred thirty-one".