22143668 has 6 divisors (see below), whose sum is σ = 38751426. Its totient is φ = 11071832.

The previous prime is 22143637. The next prime is 22143689. The reversal of 22143668 is 86634122.

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 1965604 = 4492^2 + 1402^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767955 + ... + 2767962.

It is an arithmetic number, because the mean of its divisors is an integer number (6458571).

Almost surely, 2^22143668 is an apocalyptic number.

It is an amenable number.

22143668 is a deficient number, since it is larger than the sum of its proper divisors (16607758).

22143668 is a wasteful number, since it uses less digits than its factorization.

22143668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535921 (or 5535919 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 22143668 is about 4705.7058981624. The cubic root of 22143668 is about 280.8125546668.

The spelling of 22143668 in words is "twenty-two million, one hundred forty-three thousand, six hundred sixty-eight".