20730022 has 4 divisors (see below), whose sum is σ = 31095036. Its totient is φ = 10365010.

The previous prime is 20730011. The next prime is 20730037. The reversal of 20730022 is 22003702.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20729978 and 20730005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5182504 + ... + 5182507.

It is an arithmetic number, because the mean of its divisors is an integer number (7773759).

Almost surely, 2^20730022 is an apocalyptic number.

20730022 is a deficient number, since it is larger than the sum of its proper divisors (10365014).

20730022 is a wasteful number, since it uses less digits than its factorization.

20730022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365013.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20730022 is about 4553.0233911106. The cubic root of 20730022 is about 274.7050148199.

Adding to 20730022 its reverse (22003702), we get a palindrome (42733724).

The spelling of 20730022 in words is "twenty million, seven hundred thirty thousand, twenty-two".