21824174929 has 2 divisors, whose sum is σ = 21824174930. Its totient is φ = 21824174928.

The previous prime is 21824174927. The next prime is 21824174947. The reversal of 21824174929 is 92947142812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21421249600 + 402925329 = 146360^2 + 20073^2 .

It is a cyclic number.

It is not a de Polignac number, because 21824174929 - 2¹ = 21824174927 is a prime.

It is a super-2 number, since 2×21824174929² (a number of 21 digits) contains 22 as substring.

Together with 21824174927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21824174927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10912087464 + 10912087465.

It is an arithmetic number, because the mean of its divisors is an integer number (10912087465).

Almost surely, 2^21824174929 is an apocalyptic number.

It is an amenable number.

21824174929 is a deficient number, since it is larger than the sum of its proper divisors (1).

21824174929 is an equidigital number, since it uses as much as digits as its factorization.

21824174929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The spelling of 21824174929 in words is "twenty-one billion, eight hundred twenty-four million, one hundred seventy-four thousand, nine hundred twenty-nine".