20524429 has 2 divisors, whose sum is σ = 20524430. Its totient is φ = 20524428.

The previous prime is 20524421. The next prime is 20524433. The reversal of 20524429 is 92442502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17867529 + 2656900 = 4227^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524429 - 2³ = 20524421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20524397 and 20524406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20524421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262214 + 10262215.

It is an arithmetic number, because the mean of its divisors is an integer number (10262215).

Almost surely, 2^20524429 is an apocalyptic number.

It is an amenable number.

20524429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524429 is an equidigital number, since it uses as much as digits as its factorization.

20524429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20524429 is about 4530.3894976039. The cubic root of 20524429 is about 273.7938536807.

The spelling of 20524429 in words is "twenty million, five hundred twenty-four thousand, four hundred twenty-nine".