22031668 has 6 divisors (see below), whose sum is σ = 38555426. Its totient is φ = 11015832.

The previous prime is 22031663. The next prime is 22031671. The reversal of 22031668 is 86613022.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 6492304 = 3942^2 + 2548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2753955 + ... + 2753962.

Almost surely, 2^22031668 is an apocalyptic number.

It is an amenable number.

22031668 is a deficient number, since it is larger than the sum of its proper divisors (16523758).

22031668 is a wasteful number, since it uses less digits than its factorization.

22031668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507921 (or 5507919 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22031668 is about 4693.7903660049. The cubic root of 22031668 is about 280.3383155487.

The spelling of 22031668 in words is "twenty-two million, thirty-one thousand, six hundred sixty-eight".