20053866 has 32 divisors (see below), whose sum is σ = 46817280. Its totient is φ = 5607216.

The previous prime is 20053841. The next prime is 20053871. The reversal of 20053866 is 66835002.

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, 3106 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (1463040).

Almost surely, 2^20053866 is an apocalyptic number.

20053866 is an abundant number, since it is smaller than the sum of its proper divisors (26763414).

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

20053866 is a wasteful number, since it uses less digits than its factorization.

20053866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20053866 is about 4478.1543073012. The cubic root of 20053866 is about 271.6852345738.

Adding to 20053866 its reverse (66835002), we get a palindrome (86888868).

The spelling of 20053866 in words is "twenty million, fifty-three thousand, eight hundred sixty-six".