20849104 has 10 divisors (see below), whose sum is σ = 40395170. Its totient is φ = 10424544.

The previous prime is 20849077. The next prime is 20849107. The reversal of 20849104 is 40194802.

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 3610000 = 4152^2 + 1900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20849107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651519 + ... + 651550.

It is an arithmetic number, because the mean of its divisors is an integer number (4039517).

Almost surely, 2^20849104 is an apocalyptic number.

It is an amenable number.

20849104 is a deficient number, since it is larger than the sum of its proper divisors (19546066).

20849104 is a wasteful number, since it uses less digits than its factorization.

20849104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303077 (or 1303071 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20849104 is about 4566.0819090332. The cubic root of 20849104 is about 275.2300180209.

The spelling of 20849104 in words is "twenty million, eight hundred forty-nine thousand, one hundred four".