22001985 has 24 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 11534112.

The previous prime is 22001897. The next prime is 22001989. The reversal of 22001985 is 58910022.

It is not a de Polignac number, because 22001985 - 2⁷ = 22001857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22001989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1489 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (1616160).

Almost surely, 2^22001985 is an apocalyptic number.

It is an amenable number.

22001985 is a deficient number, since it is larger than the sum of its proper divisors (16785855).

22001985 is a wasteful number, since it uses less digits than its factorization.

22001985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357 (or 8354 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 22001985 is about 4690.6273567616. The cubic root of 22001985 is about 280.2123601577.

The spelling of 22001985 in words is "twenty-two million, one thousand, nine hundred eighty-five".