20226660 has 48 divisors (see below), whose sum is σ = 59101056. Its totient is φ = 5158912.

The previous prime is 20226649. The next prime is 20226673. The reversal of 20226660 is 6662202.

It is a self number, because there is not a number n which added to its sum of digits gives 20226660.

It is a congruent number.

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, 5949 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (1231272).

Almost surely, 2^20226660 is an apocalyptic number.

20226660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20226660 is an abundant number, since it is smaller than the sum of its proper divisors (38874396).

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

20226660 is a wasteful number, since it uses less digits than its factorization.

20226660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14692 (or 14690 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20226660 is about 4497.4059189715. The cubic root of 20226660 is about 272.4633286791.

Adding to 20226660 its reverse (6662202), we get a palindrome (26888862).

It can be divided in two parts, 202 and 26660, that added together give a palindrome (26862).

The spelling of 20226660 in words is "twenty million, two hundred twenty-six thousand, six hundred sixty".