20215622 has 16 divisors (see below), whose sum is σ = 34774272. Its totient is φ = 8634120.

The previous prime is 20215621. The next prime is 20215661. The reversal of 20215622 is 22651202.

It is a junction number, because it is equal to n+sod(n) for n = 20215594 and 20215603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215621) 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 7 ways as a sum of consecutive naturals, for example, 2033 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (2173392).

Almost surely, 2^20215622 is an apocalyptic number.

20215622 is a deficient number, since it is larger than the sum of its proper divisors (14558650).

20215622 is a wasteful number, since it uses less digits than its factorization.

20215622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4963.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20215622 is about 4496.1785996555. The cubic root of 20215622 is about 272.4137571819.

Adding to 20215622 its reverse (22651202), we get a palindrome (42866824).

The spelling of 20215622 in words is "twenty million, two hundred fifteen thousand, six hundred twenty-two".