21650054226 has 32 divisors (see below), whose sum is σ = 46238169600. Its totient is φ = 6743063040.

The previous prime is 21650054191. The next prime is 21650054243. The reversal of 21650054226 is 62245005612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001471 + ... + 2012258.

It is an arithmetic number, because the mean of its divisors is an integer number (1444942800).

Almost surely, 2^21650054226 is an apocalyptic number.

21650054226 is an abundant number, since it is smaller than the sum of its proper divisors (24588115374).

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

21650054226 is a wasteful number, since it uses less digits than its factorization.

21650054226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013794.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21650054226 its reverse (62245005612), we get a palindrome (83895059838).

The spelling of 21650054226 in words is "twenty-one billion, six hundred fifty million, fifty-four thousand, two hundred twenty-six".