20312226 has 24 divisors (see below), whose sum is σ = 48011184. Its totient is φ = 6155160.

The previous prime is 20312221. The next prime is 20312233. The reversal of 20312226 is 62221302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20312199 and 20312208.

It is not an unprimeable number, because it can be changed into a prime (20312221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51096 + ... + 51491.

It is an arithmetic number, because the mean of its divisors is an integer number (2000466).

Almost surely, 2^20312226 is an apocalyptic number.

20312226 is an abundant number, since it is smaller than the sum of its proper divisors (27698958).

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

20312226 is a wasteful number, since it uses less digits than its factorization.

20312226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102606 (or 102603 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20312226 is about 4506.9086966567. The cubic root of 20312226 is about 272.8469939222.

Adding to 20312226 its reverse (62221302), we get a palindrome (82533528).

The spelling of 20312226 in words is "twenty million, three hundred twelve thousand, two hundred twenty-six".