20694705 has 16 divisors (see below), whose sum is σ = 34854720. Its totient is φ = 10456128.

The previous prime is 20694703. The next prime is 20694721. The reversal of 20694705 is 50749602.

It is not a de Polignac number, because 20694705 - 2¹ = 20694703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20694703) 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, 36022 + ... + 36591.

It is an arithmetic number, because the mean of its divisors is an integer number (2178420).

Almost surely, 2^20694705 is an apocalyptic number.

It is an amenable number.

20694705 is a deficient number, since it is larger than the sum of its proper divisors (14160015).

20694705 is a wasteful number, since it uses less digits than its factorization.

20694705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72640.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20694705 is about 4549.1433259461. The cubic root of 20694705 is about 274.5489244285.

The spelling of 20694705 in words is "twenty million, six hundred ninety-four thousand, seven hundred five".