20849120 has 24 divisors (see below), whose sum is σ = 49256424. Its totient is φ = 8339584.

The previous prime is 20849119. The next prime is 20849131. The reversal of 20849120 is 2194802.

It is a self number, because there is not a number n which added to its sum of digits gives 20849120.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 64994 + ... + 65313.

It is an arithmetic number, because the mean of its divisors is an integer number (2052351).

Almost surely, 2^20849120 is an apocalyptic number.

20849120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20849120 is an abundant number, since it is smaller than the sum of its proper divisors (28407304).

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

20849120 is a wasteful number, since it uses less digits than its factorization.

20849120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130322 (or 130314 counting only the distinct ones).

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

The square root of 20849120 is about 4566.0836610820. The cubic root of 20849120 is about 275.2300884265.

The spelling of 20849120 in words is "twenty million, eight hundred forty-nine thousand, one hundred twenty".