20673705 has 16 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 10177728.

The previous prime is 20673701. The next prime is 20673769. The reversal of 20673705 is 50737602.

It is not a de Polignac number, because 20673705 - 2² = 20673701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20673701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52815 + ... + 53204.

It is an arithmetic number, because the mean of its divisors is an integer number (2226420).

Almost surely, 2^20673705 is an apocalyptic number.

It is an amenable number.

20673705 is a deficient number, since it is larger than the sum of its proper divisors (14949015).

20673705 is a wasteful number, since it uses less digits than its factorization.

20673705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106040.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 20673705 is about 4546.8346132227. The cubic root of 20673705 is about 274.4560266122.

The spelling of 20673705 in words is "twenty million, six hundred seventy-three thousand, seven hundred five".