20298529 has 4 divisors (see below), whose sum is σ = 20478276. Its totient is φ = 20118784.

The previous prime is 20298503. The next prime is 20298539. The reversal of 20298529 is 92589202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92589202 = 2 ⋅46294601.

It can be written as a sum of positive squares in 2 ways, for example, as 2108304 + 18190225 = 1452^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20298529 - 2⁷ = 20298401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20298539) 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 in 3 ways as a sum of consecutive naturals, for example, 89704 + ... + 89929.

It is an arithmetic number, because the mean of its divisors is an integer number (5119569).

Almost surely, 2^20298529 is an apocalyptic number.

It is an amenable number.

20298529 is a deficient number, since it is larger than the sum of its proper divisors (179747).

20298529 is a wasteful number, since it uses less digits than its factorization.

20298529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179746.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20298529 is about 4505.3888844361. The cubic root of 20298529 is about 272.7856511360.

The spelling of 20298529 in words is "twenty million, two hundred ninety-eight thousand, five hundred twenty-nine".