22009138 has 8 divisors (see below), whose sum is σ = 33036588. Its totient is φ = 10996944.

The previous prime is 22009109. The next prime is 22009147. The reversal of 22009138 is 83190022.

It can be written as a sum of positive squares in 2 ways, for example, as 21687649 + 321489 = 4657^2 + 567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020 + ... + 6712.

Almost surely, 2^22009138 is an apocalyptic number.

22009138 is a deficient number, since it is larger than the sum of its proper divisors (11027450).

22009138 is a wasteful number, since it uses less digits than its factorization.

22009138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 22009138 is about 4691.3897727646. The cubic root of 22009138 is about 280.2427232036.

The spelling of 22009138 in words is "twenty-two million, nine thousand, one hundred thirty-eight".