20704811 has 8 divisors (see below), whose sum is σ = 21783600. Its totient is φ = 19650400.

The previous prime is 20704787. The next prime is 20704819. The reversal of 20704811 is 11840702.

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

It is a de Polignac number, because none of the positive numbers 2^k-20704811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20704819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4340 + ... + 7761.

It is an arithmetic number, because the mean of its divisors is an integer number (2722950).

Almost surely, 2^20704811 is an apocalyptic number.

20704811 is a deficient number, since it is larger than the sum of its proper divisors (1078789).

20704811 is a wasteful number, since it uses less digits than its factorization.

20704811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12189.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20704811 is about 4550.2539489571. The cubic root of 20704811 is about 274.5936079986.

The spelling of 20704811 in words is "twenty million, seven hundred four thousand, eight hundred eleven".