20528635 has 8 divisors (see below), whose sum is σ = 25038576. Its totient is φ = 16153440.

The previous prime is 20528623. The next prime is 20528647. The reversal of 20528635 is 53682502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20528623) and next prime (20528647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20528635 - 2⁷ = 20528507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20528597 and 20528606.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 33349 + ... + 33958.

It is an arithmetic number, because the mean of its divisors is an integer number (3129822).

Almost surely, 2^20528635 is an apocalyptic number.

20528635 is a deficient number, since it is larger than the sum of its proper divisors (4509941).

20528635 is an equidigital number, since it uses as much as digits as its factorization.

20528635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 20528635 is about 4530.8536723227. The cubic root of 20528635 is about 273.8125549447.

The spelling of 20528635 in words is "twenty million, five hundred twenty-eight thousand, six hundred thirty-five".