22072637 has 4 divisors (see below), whose sum is σ = 22611036. Its totient is φ = 21534240.

The previous prime is 22072627. The next prime is 22072639. The reversal of 22072637 is 73627022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 13697401 = 2894^2 + 3701^2 .

It is a cyclic number.

It is not a de Polignac number, because 22072637 - 2⁴ = 22072621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22072639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269138 + ... + 269219.

It is an arithmetic number, because the mean of its divisors is an integer number (5652759).

Almost surely, 2^22072637 is an apocalyptic number.

It is an amenable number.

22072637 is a deficient number, since it is larger than the sum of its proper divisors (538399).

22072637 is an equidigital number, since it uses as much as digits as its factorization.

22072637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538398.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 22072637 is about 4698.1525092317. The cubic root of 22072637 is about 280.5119757047.

Adding to 22072637 its reverse (73627022), we get a palindrome (95699659).

The spelling of 22072637 in words is "twenty-two million, seventy-two thousand, six hundred thirty-seven".