20694605 has 8 divisors (see below), whose sum is σ = 24857952. Its totient is φ = 16539408.

The previous prime is 20694601. The next prime is 20694613. The reversal of 20694605 is 50649602.

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 20694605 - 2² = 20694601 is a prime.

It is a super-2 number, since 2×20694605² = 856533352212050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20694601) 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, 8894 + ... + 10976.

It is an arithmetic number, because the mean of its divisors is an integer number (3107244).

Almost surely, 2^20694605 is an apocalyptic number.

It is an amenable number.

20694605 is a deficient number, since it is larger than the sum of its proper divisors (4163347).

20694605 is a wasteful number, since it uses less digits than its factorization.

20694605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20694605 is about 4549.1323348524. The cubic root of 20694605 is about 274.5484822069.

The spelling of 20694605 in words is "twenty million, six hundred ninety-four thousand, six hundred five".