20730226 has 16 divisors (see below), whose sum is σ = 34185888. Its totient is φ = 9349600.

The previous prime is 20730217. The next prime is 20730233. The reversal of 20730226 is 62203702.

20730226 = 331² + 332² + ... + 461².

It is a super-2 number, since 2×20730226² = 859484540022152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20730197 and 20730206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715 + ... + 6478.

It is an arithmetic number, because the mean of its divisors is an integer number (2136618).

Almost surely, 2^20730226 is an apocalyptic number.

20730226 is a deficient number, since it is larger than the sum of its proper divisors (13455662).

20730226 is a wasteful number, since it uses less digits than its factorization.

20730226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20730226 is about 4553.0457937517. The cubic root of 20730226 is about 274.7059159226.

Adding to 20730226 its reverse (62203702), we get a palindrome (82933928).

The spelling of 20730226 in words is "twenty million, seven hundred thirty thousand, two hundred twenty-six".