20704473 has 6 divisors (see below), whose sum is σ = 29906474. Its totient is φ = 13802976.

The previous prime is 20704469. The next prime is 20704499. The reversal of 20704473 is 37440702.

It can be written as a sum of positive squares in only one way, i.e., 12131289 + 8573184 = 3483^2 + 2928^2 .

It is not a de Polignac number, because 20704473 - 2² = 20704469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20704403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1150240 + ... + 1150257.

Almost surely, 2^20704473 is an apocalyptic number.

It is an amenable number.

20704473 is a deficient number, since it is larger than the sum of its proper divisors (9202001).

20704473 is a wasteful number, since it uses less digits than its factorization.

20704473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300503 (or 2300500 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20704473 is about 4550.2168080213. The cubic root of 20704473 is about 274.5921137703.

The spelling of 20704473 in words is "twenty million, seven hundred four thousand, four hundred seventy-three".