220920105 has 64 divisors (see below), whose sum is σ = 423641088. Its totient is φ = 96180480.

The previous prime is 220920071. The next prime is 220920107. The reversal of 220920105 is 501029022.

It is not a de Polignac number, because 220920105 - 2⁷ = 220919977 is a prime.

It is a super-2 number, since 2×220920105² = 97611385586422050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220920107) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 217579 + ... + 218591.

It is an arithmetic number, because the mean of its divisors is an integer number (6619392).

Almost surely, 2^220920105 is an apocalyptic number.

It is an amenable number.

220920105 is a deficient number, since it is larger than the sum of its proper divisors (202720983).

220920105 is a wasteful number, since it uses less digits than its factorization.

220920105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 220920105 is about 14863.3813447681. The cubic root of 220920105 is about 604.5214940079.

Adding to 220920105 its reverse (501029022), we get a palindrome (721949127).

The spelling of 220920105 in words is "two hundred twenty million, nine hundred twenty thousand, one hundred five".