20222811 has 32 divisors (see below), whose sum is σ = 34772480. Its totient is φ = 11376288.

The previous prime is 20222791. The next prime is 20222827. The reversal of 20222811 is 11822202.

It is a happy number.

It is not a de Polignac number, because 20222811 - 2⁵ = 20222779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222861) 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 31 ways as a sum of consecutive naturals, for example, 11865 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (1086640).

Almost surely, 2^20222811 is an apocalyptic number.

20222811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20222811 is a deficient number, since it is larger than the sum of its proper divisors (14549669).

20222811 is a wasteful number, since it uses less digits than its factorization.

20222811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20222811 is about 4496.9779852697. The cubic root of 20222811 is about 272.4460449246.

The spelling of 20222811 in words is "twenty million, two hundred twenty-two thousand, eight hundred eleven".