20356222 has 4 divisors (see below), whose sum is σ = 30534336. Its totient is φ = 10178110.

The previous prime is 20356211. The next prime is 20356223. The reversal of 20356222 is 22265302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20356222² = 828751548226568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20356193 and 20356202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5089054 + ... + 5089057.

It is an arithmetic number, because the mean of its divisors is an integer number (7633584).

Almost surely, 2^20356222 is an apocalyptic number.

20356222 is a deficient number, since it is larger than the sum of its proper divisors (10178114).

20356222 is a wasteful number, since it uses less digits than its factorization.

20356222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178113.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20356222 is about 4511.7870073841. The cubic root of 20356222 is about 273.0438461333.

The spelling of 20356222 in words is "twenty million, three hundred fifty-six thousand, two hundred twenty-two".