22009977 has 12 divisors (see below), whose sum is σ = 34682544. Its totient is φ = 13339320.

The previous prime is 22009973. The next prime is 22009991. The reversal of 22009977 is 77990022.

It is not a de Polignac number, because 22009977 - 2² = 22009973 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22009973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111063 + ... + 111260.

It is an arithmetic number, because the mean of its divisors is an integer number (2890212).

Almost surely, 2^22009977 is an apocalyptic number.

It is an amenable number.

22009977 is a deficient number, since it is larger than the sum of its proper divisors (12672567).

22009977 is a wasteful number, since it uses less digits than its factorization.

22009977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222340 (or 222337 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 22009977 is about 4691.4791910441. The cubic root of 22009977 is about 280.2462841587.

Adding to 22009977 its reverse (77990022), we get a palindrome (99999999).

The spelling of 22009977 in words is "twenty-two million, nine thousand, nine hundred seventy-seven".