20372226 has 16 divisors (see below), whose sum is σ = 46565184. Its totient is φ = 5820624.

The previous prime is 20372179. The next prime is 20372249. The reversal of 20372226 is 62227302.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20372196 and 20372205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242485 + ... + 242568.

It is an arithmetic number, because the mean of its divisors is an integer number (2910324).

Almost surely, 2^20372226 is an apocalyptic number.

20372226 is an abundant number, since it is smaller than the sum of its proper divisors (26192958).

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

20372226 is a wasteful number, since it uses less digits than its factorization.

20372226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485065.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20372226 is about 4513.5602355568. The cubic root of 20372226 is about 273.1153828038.

Adding to 20372226 its reverse (62227302), we get a palindrome (82599528).

The spelling of 20372226 in words is "twenty million, three hundred seventy-two thousand, two hundred twenty-six".