20675705 has 16 divisors (see below), whose sum is σ = 26382720. Its totient is φ = 15510528.

The previous prime is 20675701. The next prime is 20675713. The reversal of 20675705 is 50757602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20675705 - 2² = 20675701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20675701) 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, 8729 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (1648920).

Almost surely, 2^20675705 is an apocalyptic number.

It is an amenable number.

20675705 is a deficient number, since it is larger than the sum of its proper divisors (5707015).

20675705 is a wasteful number, since it uses less digits than its factorization.

20675705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 20675705 is about 4547.0545411288. The cubic root of 20675705 is about 274.4648767329.

The spelling of 20675705 in words is "twenty million, six hundred seventy-five thousand, seven hundred five".