20869135 has 8 divisors (see below), whose sum is σ = 28620576. Its totient is φ = 14310240.

The previous prime is 20869129. The next prime is 20869141. The reversal of 20869135 is 53196802.

It is an interprime number because it is at equal distance from previous prime (20869129) and next prime (20869141).

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

It is not a de Polignac number, because 20869135 - 2³ = 20869127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20869135.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 298096 + ... + 298165.

It is an arithmetic number, because the mean of its divisors is an integer number (3577572).

Almost surely, 2^20869135 is an apocalyptic number.

20869135 is a deficient number, since it is larger than the sum of its proper divisors (7751441).

20869135 is an equidigital number, since it uses as much as digits as its factorization.

20869135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596273.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20869135 is about 4568.2748384921. The cubic root of 20869135 is about 275.3181332037.

The spelling of 20869135 in words is "twenty million, eight hundred sixty-nine thousand, one hundred thirty-five".