22821830 has 16 divisors (see below), whose sum is σ = 42081984. Its totient is φ = 8905920.

The previous prime is 22821817. The next prime is 22821839. The reversal of 22821830 is 3812822.

It is a self number, because there is not a number n which added to its sum of digits gives 22821830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22821839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27422 + ... + 28241.

It is an arithmetic number, because the mean of its divisors is an integer number (2630124).

Almost surely, 2^22821830 is an apocalyptic number.

22821830 is a deficient number, since it is larger than the sum of its proper divisors (19260154).

22821830 is a wasteful number, since it uses less digits than its factorization.

22821830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55711.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 22821830 is about 4777.2199028305. The cubic root of 22821830 is about 283.6504576865.

The spelling of 22821830 in words is "twenty-two million, eight hundred twenty-one thousand, eight hundred thirty".