20471222 has 12 divisors (see below), whose sum is σ = 31732308. Its totient is φ = 9904500.

The previous prime is 20471201. The next prime is 20471233. The reversal of 20471222 is 22217402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20471194 and 20471203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3404 + ... + 7247.

It is an arithmetic number, because the mean of its divisors is an integer number (2644359).

Almost surely, 2^20471222 is an apocalyptic number.

20471222 is a deficient number, since it is larger than the sum of its proper divisors (11261086).

20471222 is a wasteful number, since it uses less digits than its factorization.

20471222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10715 (or 10684 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20471222 is about 4524.5134545054. The cubic root of 20471222 is about 273.5570569008.

Adding to 20471222 its reverse (22217402), we get a palindrome (42688624).

The spelling of 20471222 in words is "twenty million, four hundred seventy-one thousand, two hundred twenty-two".