20846913 has 8 divisors (see below), whose sum is σ = 29431008. Its totient is φ = 13080384.

The previous prime is 20846869. The next prime is 20846921. The reversal of 20846913 is 31964802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20846913 - 2¹² = 20842817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20846953) 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 in 7 ways as a sum of consecutive naturals, for example, 204331 + ... + 204432.

It is an arithmetic number, because the mean of its divisors is an integer number (3678876).

Almost surely, 2^20846913 is an apocalyptic number.

It is an amenable number.

20846913 is a deficient number, since it is larger than the sum of its proper divisors (8584095).

20846913 is a wasteful number, since it uses less digits than its factorization.

20846913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408783.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20846913 is about 4565.8419814970. The cubic root of 20846913 is about 275.2203765179.

The spelling of 20846913 in words is "twenty million, eight hundred forty-six thousand, nine hundred thirteen".