20888841 has 16 divisors (see below), whose sum is σ = 28771776. Its totient is φ = 13472256.

The previous prime is 20888797. The next prime is 20888863. The reversal of 20888841 is 14888802.

It is not a de Polignac number, because 20888841 - 2⁷ = 20888713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20888841.

It is not an unprimeable number, because it can be changed into a prime (20888041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13861 + ... + 15293.

It is an arithmetic number, because the mean of its divisors is an integer number (1798236).

Almost surely, 2^20888841 is an apocalyptic number.

It is an amenable number.

20888841 is a deficient number, since it is larger than the sum of its proper divisors (7882935).

20888841 is a wasteful number, since it uses less digits than its factorization.

20888841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592.

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 20888841 is about 4570.4311612801. The cubic root of 20888841 is about 275.4047637285.

Subtracting from 20888841 its sum of digits (39), we obtain a palindrome (20888802).

The spelling of 20888841 in words is "twenty million, eight hundred eighty-eight thousand, eight hundred forty-one".