22066890 has 32 divisors (see below), whose sum is σ = 55264896. Its totient is φ = 5628480.

The previous prime is 22066861. The next prime is 22066903. The reversal of 22066890 is 9866022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15301 + ... + 16680.

It is an arithmetic number, because the mean of its divisors is an integer number (1727028).

Almost surely, 2^22066890 is an apocalyptic number.

22066890 is an abundant number, since it is smaller than the sum of its proper divisors (33198006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22066890 is a wasteful number, since it uses less digits than its factorization.

22066890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32014.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 22066890 is about 4697.5408460172. The cubic root of 22066890 is about 280.4876281795.

The spelling of 22066890 in words is "twenty-two million, sixty-six thousand, eight hundred ninety".