22071898 has 4 divisors (see below), whose sum is σ = 33107850. Its totient is φ = 11035948.

The previous prime is 22071893. The next prime is 22071913. The reversal of 22071898 is 89817022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89817022 = 2 ⋅44908511.

It can be written as a sum of positive squares in only one way, i.e., 21743569 + 328329 = 4663^2 + 573^2 .

It is not an unprimeable number, because it can be changed into a prime (22071893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5517973 + ... + 5517976.

Almost surely, 2^22071898 is an apocalyptic number.

22071898 is a deficient number, since it is larger than the sum of its proper divisors (11035952).

22071898 is a wasteful number, since it uses less digits than its factorization.

22071898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11035951.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22071898 is about 4698.0738606369. The cubic root of 22071898 is about 280.5088451217.

The spelling of 22071898 in words is "twenty-two million, seventy-one thousand, eight hundred ninety-eight".