20331705 has 8 divisors (see below), whose sum is σ = 32530752. Its totient is φ = 10843568.

The previous prime is 20331679. The next prime is 20331721. The reversal of 20331705 is 50713302.

It is a happy number.

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 20331705 - 2⁵ = 20331673 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677709 + ... + 677738.

It is an arithmetic number, because the mean of its divisors is an integer number (4066344).

Almost surely, 2^20331705 is an apocalyptic number.

It is an amenable number.

20331705 is a deficient number, since it is larger than the sum of its proper divisors (12199047).

20331705 is a wasteful number, since it uses less digits than its factorization.

20331705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355455.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 20331705 is about 4509.0691944125. The cubic root of 20331705 is about 272.9341842442.

The spelling of 20331705 in words is "twenty million, three hundred thirty-one thousand, seven hundred five".