20730611 has 4 divisors (see below), whose sum is σ = 22615224. Its totient is φ = 18846000.

The previous prime is 20730607. The next prime is 20730623. The reversal of 20730611 is 11603702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20730611 - 2² = 20730607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20730011) 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, 942290 + ... + 942311.

It is an arithmetic number, because the mean of its divisors is an integer number (5653806).

Almost surely, 2^20730611 is an apocalyptic number.

20730611 is a deficient number, since it is larger than the sum of its proper divisors (1884613).

20730611 is a wasteful number, since it uses less digits than its factorization.

20730611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884612.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 20730611 is about 4553.0880729457. The cubic root of 20730611 is about 274.7076165171.

The spelling of 20730611 in words is "twenty million, seven hundred thirty thousand, six hundred eleven".