22153730 has 16 divisors (see below), whose sum is σ = 40018104. Its totient is φ = 8830080.

The previous prime is 22153723. The next prime is 22153739. The reversal of 22153730 is 3735122.

It can be written as a sum of positive squares in 4 ways, for example, as 19882681 + 2271049 = 4459^2 + 1507^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22153696 and 22153705.

It is not an unprimeable number, because it can be changed into a prime (22153739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851 + ... + 6710.

Almost surely, 2^22153730 is an apocalyptic number.

22153730 is a deficient number, since it is larger than the sum of its proper divisors (17864374).

22153730 is a wasteful number, since it uses less digits than its factorization.

22153730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 22153730 is about 4706.7749043267. The cubic root of 22153730 is about 280.8550816180.

Adding to 22153730 its reverse (3735122), we get a palindrome (25888852).

The spelling of 22153730 in words is "twenty-two million, one hundred fifty-three thousand, seven hundred thirty".