22013530 has 96 divisors (see below), whose sum is σ = 52399872. Its totient is φ = 6504960.

The previous prime is 22013491. The next prime is 22013539. The reversal of 22013530 is 3531022.

22013530 is a modest number, since divided by 13530 gives 220 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22013539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194754 + ... + 194866.

It is an arithmetic number, because the mean of its divisors is an integer number (545832).

Almost surely, 2^22013530 is an apocalyptic number.

22013530 is an abundant number, since it is smaller than the sum of its proper divisors (30386342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22013530 is a wasteful number, since it uses less digits than its factorization.

22013530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 22013530 is about 4691.8578409837. The cubic root of 22013530 is about 280.2613631003.

Adding to 22013530 its reverse (3531022), we get a palindrome (25544552).

The spelling of 22013530 in words is "twenty-two million, thirteen thousand, five hundred thirty".