20730603 has 4 divisors (see below), whose sum is σ = 27640808. Its totient is φ = 13820400.

The previous prime is 20730587. The next prime is 20730607. The reversal of 20730603 is 30603702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20730603 - 2⁴ = 20730587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20730603.

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 3 ways as a sum of consecutive naturals, for example, 3455098 + ... + 3455103.

It is an arithmetic number, because the mean of its divisors is an integer number (6910202).

Almost surely, 2^20730603 is an apocalyptic number.

20730603 is a deficient number, since it is larger than the sum of its proper divisors (6910205).

20730603 is an equidigital number, since it uses as much as digits as its factorization.

20730603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910204.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20730603 is about 4553.0871944209. The cubic root of 20730603 is about 274.7075811803.

The spelling of 20730603 in words is "twenty million, seven hundred thirty thousand, six hundred three".