21824741631 has 32 divisors (see below), whose sum is σ = 36292953600. Its totient is φ = 11333508480.

The previous prime is 21824741621. The next prime is 21824741669. The reversal of 21824741631 is 13614742812.

It is not a de Polignac number, because 21824741631 - 2⁶ = 21824741567 is a prime.

It is a super-2 number, since 2×21824741631² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21824741631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21824741621) 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 31 ways as a sum of consecutive naturals, for example, 702985 + ... + 733373.

It is an arithmetic number, because the mean of its divisors is an integer number (1134154800).

Almost surely, 2^21824741631 is an apocalyptic number.

21824741631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21824741631 is a deficient number, since it is larger than the sum of its proper divisors (14468211969).

21824741631 is a wasteful number, since it uses less digits than its factorization.

21824741631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33519.

The product of its digits is 64512, while the sum is 39.

The spelling of 21824741631 in words is "twenty-one billion, eight hundred twenty-four million, seven hundred forty-one thousand, six hundred thirty-one".