20933705 has 8 divisors (see below), whose sum is σ = 27052872. Its totient is φ = 15458688.

The previous prime is 20933701. The next prime is 20933707. The reversal of 20933705 is 50733902.

It can be written as a sum of positive squares in 4 ways, for example, as 67081 + 20866624 = 259^2 + 4568^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20933705 - 2² = 20933701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20933701) 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, 160964 + ... + 161093.

It is an arithmetic number, because the mean of its divisors is an integer number (3381609).

Almost surely, 2^20933705 is an apocalyptic number.

It is an amenable number.

20933705 is a deficient number, since it is larger than the sum of its proper divisors (6119167).

20933705 is a wasteful number, since it uses less digits than its factorization.

20933705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322075.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 20933705 is about 4575.3365996394. The cubic root of 20933705 is about 275.6017895658.

The spelling of 20933705 in words is "twenty million, nine hundred thirty-three thousand, seven hundred five".