20831841 has 24 divisors (see below), whose sum is σ = 30869280. Its totient is φ = 13533696.

The previous prime is 20831827. The next prime is 20831849. The reversal of 20831841 is 14813802.

It is not a de Polignac number, because 20831841 - 2¹⁵ = 20799073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20831849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107841 + ... + 108033.

It is an arithmetic number, because the mean of its divisors is an integer number (1286220).

Almost surely, 2^20831841 is an apocalyptic number.

It is an amenable number.

20831841 is a deficient number, since it is larger than the sum of its proper divisors (10037439).

20831841 is a wasteful number, since it uses less digits than its factorization.

20831841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20831841 is about 4564.1911660227. The cubic root of 20831841 is about 275.1540338162.

The spelling of 20831841 in words is "twenty million, eight hundred thirty-one thousand, eight hundred forty-one".