21741198831 has 12 divisors (see below), whose sum is σ = 34258858920. Its totient is φ = 13176484080.

The previous prime is 21741198821. The next prime is 21741198839. The reversal of 21741198831 is 13889114712.

It is a happy number.

It is not a de Polignac number, because 21741198831 - 2¹⁷ = 21741067759 is a prime.

It is a super-2 number, since 2×21741198831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741198839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109803936 + ... + 109804133.

It is an arithmetic number, because the mean of its divisors is an integer number (2854904910).

Almost surely, 2^21741198831 is an apocalyptic number.

21741198831 is a deficient number, since it is larger than the sum of its proper divisors (12517660089).

21741198831 is a wasteful number, since it uses less digits than its factorization.

21741198831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219608086 (or 219608083 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The spelling of 21741198831 in words is "twenty-one billion, seven hundred forty-one million, one hundred ninety-eight thousand, eight hundred thirty-one".