20893705 has 8 divisors (see below), whose sum is σ = 28654272. Its totient is φ = 14327088.

The previous prime is 20893699. The next prime is 20893727. The reversal of 20893705 is 50739802.

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

It is a cyclic number.

It is not a de Polignac number, because 20893705 - 2⁷ = 20893577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298447 + ... + 298516.

It is an arithmetic number, because the mean of its divisors is an integer number (3581784).

Almost surely, 2^20893705 is an apocalyptic number.

It is an amenable number.

20893705 is a deficient number, since it is larger than the sum of its proper divisors (7760567).

20893705 is an equidigital number, since it uses as much as digits as its factorization.

20893705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596975.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20893705 is about 4570.9632464066. The cubic root of 20893705 is about 275.4261382160.

The spelling of 20893705 in words is "twenty million, eight hundred ninety-three thousand, seven hundred five".