22081977 has 20 divisors (see below), whose sum is σ = 33192720. Its totient is φ = 14629464.

The previous prime is 22081967. The next prime is 22081979. The reversal of 22081977 is 77918022.

It is not a de Polignac number, because 22081977 - 2⁷ = 22081849 is a prime.

It is a super-2 number, since 2×22081977² = 975227416457058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22081979) 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 19 ways as a sum of consecutive naturals, for example, 13738 + ... + 15260.

It is an arithmetic number, because the mean of its divisors is an integer number (1659636).

Almost surely, 2^22081977 is an apocalyptic number.

22081977 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22081977 is a deficient number, since it is larger than the sum of its proper divisors (11110743).

22081977 is a wasteful number, since it uses less digits than its factorization.

22081977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 22081977 is about 4699.1464118497. The cubic root of 22081977 is about 280.5515361854.

Adding to 22081977 its reverse (77918022), we get a palindrome (99999999).

The spelling of 22081977 in words is "twenty-two million, eighty-one thousand, nine hundred seventy-seven".