22013872 has 20 divisors (see below), whose sum is σ = 42817696. Its totient is φ = 10964160.

The previous prime is 22013867. The next prime is 22013879. The reversal of 22013872 is 27831022.

It is a super-2 number, since 2×22013872² = 969221120864768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22013879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798 + ... + 6874.

Almost surely, 2^22013872 is an apocalyptic number.

It is an amenable number.

22013872 is a deficient number, since it is larger than the sum of its proper divisors (20803824).

22013872 is a wasteful number, since it uses less digits than its factorization.

22013872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356 (or 5350 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 22013872 is about 4691.8942869592. The cubic root of 22013872 is about 280.2628144636.

Adding to 22013872 its reverse (27831022), we get a palindrome (49844894).

The spelling of 22013872 in words is "twenty-two million, thirteen thousand, eight hundred seventy-two".