22706437 has 4 divisors (see below), whose sum is σ = 24453100. Its totient is φ = 20959776.

The previous prime is 22706429. The next prime is 22706443. The reversal of 22706437 is 73460722.

It is a happy number.

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 13549761 + 9156676 = 3681^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 22706437 - 2³ = 22706429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22706399 and 22706408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22706137) 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, 873312 + ... + 873337.

It is an arithmetic number, because the mean of its divisors is an integer number (6113275).

Almost surely, 2^22706437 is an apocalyptic number.

It is an amenable number.

22706437 is a deficient number, since it is larger than the sum of its proper divisors (1746663).

22706437 is a wasteful number, since it uses less digits than its factorization.

22706437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746662.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 22706437 is about 4765.1271756376. The cubic root of 22706437 is about 283.1715799534.

The spelling of 22706437 in words is "twenty-two million, seven hundred six thousand, four hundred thirty-seven".