20922220 has 24 divisors (see below), whose sum is σ = 47931408. Its totient is φ = 7608000.

The previous prime is 20922199. The next prime is 20922269. The reversal of 20922220 is 2222902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47331 + ... + 47770.

It is an arithmetic number, because the mean of its divisors is an integer number (1997142).

Almost surely, 2^20922220 is an apocalyptic number.

20922220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20922220 is an abundant number, since it is smaller than the sum of its proper divisors (27009188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20922220 is a wasteful number, since it uses less digits than its factorization.

20922220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95121 (or 95119 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20922220 is about 4574.0813285293. The cubic root of 20922220 is about 275.5513785884.

The spelling of 20922220 in words is "twenty million, nine hundred twenty-two thousand, two hundred twenty".