20372222 has 16 divisors (see below), whose sum is σ = 34845552. Its totient is φ = 8849280.

The previous prime is 20372179. The next prime is 20372249. The reversal of 20372222 is 22227302.

It is a junction number, because it is equal to n+sod(n) for n = 20372194 and 20372203.

It is a congruent number.

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, 22604 + ... + 23487.

It is an arithmetic number, because the mean of its divisors is an integer number (2177847).

Almost surely, 2^20372222 is an apocalyptic number.

20372222 is a deficient number, since it is larger than the sum of its proper divisors (14473330).

20372222 is a wasteful number, since it uses less digits than its factorization.

20372222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46123.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20372222 is about 4513.5597924476. The cubic root of 20372222 is about 273.1153649288.

Adding to 20372222 its reverse (22227302), we get a palindrome (42599524).

The spelling of 20372222 in words is "twenty million, three hundred seventy-two thousand, two hundred twenty-two".