20385706 has 8 divisors (see below), whose sum is σ = 33358464. Its totient is φ = 9266220.

The previous prime is 20385697. The next prime is 20385719. The reversal of 20385706 is 60758302.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463290 + ... + 463333.

It is an arithmetic number, because the mean of its divisors is an integer number (4169808).

Almost surely, 2^20385706 is an apocalyptic number.

20385706 is a deficient number, since it is larger than the sum of its proper divisors (12972758).

20385706 is a wasteful number, since it uses less digits than its factorization.

20385706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926636.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20385706 is about 4515.0532665739. The cubic root of 20385706 is about 273.1756083226.

It can be divided in two parts, 2038 and 5706, that added together give a square (7744 = 88²).

The spelling of 20385706 in words is "twenty million, three hundred eighty-five thousand, seven hundred six".