20736385 has 8 divisors (see below), whose sum is σ = 24914880. Its totient is φ = 16568304.

The previous prime is 20736367. The next prime is 20736407. The reversal of 20736385 is 58363702.

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 20736385 - 2⁷ = 20736257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20736385.

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, 2806 + ... + 7024.

It is an arithmetic number, because the mean of its divisors is an integer number (3114360).

Almost surely, 2^20736385 is an apocalyptic number.

It is an amenable number.

20736385 is a deficient number, since it is larger than the sum of its proper divisors (4178495).

20736385 is an equidigital number, since it uses as much as digits as its factorization.

20736385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20736385 is about 4553.7221039497. The cubic root of 20736385 is about 274.7331184916.

The spelling of 20736385 in words is "twenty million, seven hundred thirty-six thousand, three hundred eighty-five".