20730605 has 8 divisors (see below), whose sum is σ = 28430592. Its totient is φ = 14215248.

The previous prime is 20730587. The next prime is 20730607. The reversal of 20730605 is 50603702.

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 20730605 - 2¹² = 20726509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296117 + ... + 296186.

It is an arithmetic number, because the mean of its divisors is an integer number (3553824).

Almost surely, 2^20730605 is an apocalyptic number.

It is an amenable number.

20730605 is a deficient number, since it is larger than the sum of its proper divisors (7699987).

20730605 is an equidigital number, since it uses as much as digits as its factorization.

20730605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592315.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20730605 is about 4553.0874140521. The cubic root of 20730605 is about 274.7075900145.

The spelling of 20730605 in words is "twenty million, seven hundred thirty thousand, six hundred five".