20846949 has 16 divisors (see below), whose sum is σ = 28506240. Its totient is φ = 13547520.

The previous prime is 20846941. The next prime is 20846953. The reversal of 20846949 is 94964802.

It is not a de Polignac number, because 20846949 - 2³ = 20846941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20846949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20846941) 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, 20157 + ... + 21165.

It is an arithmetic number, because the mean of its divisors is an integer number (1781640).

Almost surely, 2^20846949 is an apocalyptic number.

It is an amenable number.

20846949 is a deficient number, since it is larger than the sum of its proper divisors (7659291).

20846949 is a wasteful number, since it uses less digits than its factorization.

20846949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 20846949 is about 4565.8459238130. The cubic root of 20846949 is about 275.2205349415.

The spelling of 20846949 in words is "twenty million, eight hundred forty-six thousand, nine hundred forty-nine".