20540226 has 16 divisors (see below), whose sum is σ = 46949184. Its totient is φ = 5868624.

The previous prime is 20540209. The next prime is 20540227. The reversal of 20540226 is 62204502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20540227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244485 + ... + 244568.

It is an arithmetic number, because the mean of its divisors is an integer number (2934324).

Almost surely, 2^20540226 is an apocalyptic number.

20540226 is an abundant number, since it is smaller than the sum of its proper divisors (26408958).

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

20540226 is a wasteful number, since it uses less digits than its factorization.

20540226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489065.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20540226 is about 4532.1326105929. The cubic root of 20540226 is about 273.8640791398.

Adding to 20540226 its reverse (62204502), we get a palindrome (82744728).

The spelling of 20540226 in words is "twenty million, five hundred forty thousand, two hundred twenty-six".