20261226 has 16 divisors (see below), whose sum is σ = 40773024. Its totient is φ = 6711984.

The previous prime is 20261191. The next prime is 20261231. The reversal of 20261226 is 62216202.

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, 9381 + ... + 11336.

It is an arithmetic number, because the mean of its divisors is an integer number (2548314).

Almost surely, 2^20261226 is an apocalyptic number.

20261226 is an abundant number, since it is smaller than the sum of its proper divisors (20511798).

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

20261226 is a wasteful number, since it uses less digits than its factorization.

20261226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20885.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20261226 is about 4501.2471605101. The cubic root of 20261226 is about 272.6184475110.

Adding to 20261226 its reverse (62216202), we get a palindrome (82477428).

The spelling of 20261226 in words is "twenty million, two hundred sixty-one thousand, two hundred twenty-six".