20730322 has 4 divisors (see below), whose sum is σ = 31095486. Its totient is φ = 10365160.

The previous prime is 20730313. The next prime is 20730373. The reversal of 20730322 is 22303702.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 15752961 + 4977361 = 3969^2 + 2231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20730322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5182579 + ... + 5182582.

Almost surely, 2^20730322 is an apocalyptic number.

20730322 is a deficient number, since it is larger than the sum of its proper divisors (10365164).

20730322 is a wasteful number, since it uses less digits than its factorization.

20730322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365163.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 20730322 is about 4553.0563361329. The cubic root of 20730322 is about 274.7063399689.

The spelling of 20730322 in words is "twenty million, seven hundred thirty thousand, three hundred twenty-two".