20842910 has 32 divisors (see below), whose sum is σ = 41407200. Its totient is φ = 7490560.

The previous prime is 20842891. The next prime is 20842919. The reversal of 20842910 is 1924802.

It is a self number, because there is not a number n which added to its sum of digits gives 20842910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8726 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (1293975).

Almost surely, 2^20842910 is an apocalyptic number.

20842910 is a deficient number, since it is larger than the sum of its proper divisors (20564290).

20842910 is a wasteful number, since it uses less digits than its factorization.

20842910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20842910 is about 4565.4035966166. The cubic root of 20842910 is about 275.2027595580.

It can be divided in two parts, 2084 and 2910, that added together give a palindrome (4994).

The spelling of 20842910 in words is "twenty million, eight hundred forty-two thousand, nine hundred ten".