21524241829 has 2 divisors, whose sum is σ = 21524241830. Its totient is φ = 21524241828.

The previous prime is 21524241821. The next prime is 21524241833. The reversal of 21524241829 is 92814242512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19004001025 + 2520240804 = 137855^2 + 50202^2 .

It is a cyclic number.

It is not a de Polignac number, because 21524241829 - 2³ = 21524241821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21524241791 and 21524241800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21524241821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10762120914 + 10762120915.

It is an arithmetic number, because the mean of its divisors is an integer number (10762120915).

Almost surely, 2^21524241829 is an apocalyptic number.

It is an amenable number.

21524241829 is a deficient number, since it is larger than the sum of its proper divisors (1).

21524241829 is an equidigital number, since it uses as much as digits as its factorization.

21524241829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The spelling of 21524241829 in words is "twenty-one billion, five hundred twenty-four million, two hundred forty-one thousand, eight hundred twenty-nine".