22021013 has 8 divisors (see below), whose sum is σ = 25486080. Its totient is φ = 18635760.

The previous prime is 22021009. The next prime is 22021049. The reversal of 22021013 is 31012022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22021013 - 2² = 22021009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020985 and 22021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19358 + ... + 20463.

It is an arithmetic number, because the mean of its divisors is an integer number (3185760).

Almost surely, 2^22021013 is an apocalyptic number.

It is an amenable number.

22021013 is a deficient number, since it is larger than the sum of its proper divisors (3465067).

22021013 is an equidigital number, since it uses as much as digits as its factorization.

22021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39907.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22021013 is about 4692.6552185303. The cubic root of 22021013 is about 280.2931156663.

Adding to 22021013 its reverse (31012022), we get a palindrome (53033035).

The spelling of 22021013 in words is "twenty-two million, twenty-one thousand, thirteen".