20801675 has 12 divisors (see below), whose sum is σ = 27152280. Its totient is φ = 15765120.

The previous prime is 20801647. The next prime is 20801681. The reversal of 20801675 is 57610802.

It is not a de Polignac number, because 20801675 - 2⁸ = 20801419 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 21422 + ... + 22371.

It is an arithmetic number, because the mean of its divisors is an integer number (2262690).

Almost surely, 2^20801675 is an apocalyptic number.

20801675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20801675 is a deficient number, since it is larger than the sum of its proper divisors (6350605).

20801675 is a wasteful number, since it uses less digits than its factorization.

20801675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43822 (or 43817 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20801675 is about 4560.8853307225. The cubic root of 20801675 is about 275.0211553973.

The spelling of 20801675 in words is "twenty million, eight hundred one thousand, six hundred seventy-five".