20705069 has 8 divisors (see below), whose sum is σ = 25814208. Its totient is φ = 16133760.

The previous prime is 20705053. The next prime is 20705071. The reversal of 20705069 is 96050702.

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 20705069 - 2⁴ = 20705053 is a prime.

It is a super-2 number, since 2×20705069² = 857399764589522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134372 + ... + 134525.

It is an arithmetic number, because the mean of its divisors is an integer number (3226776).

Almost surely, 2^20705069 is an apocalyptic number.

It is an amenable number.

20705069 is a deficient number, since it is larger than the sum of its proper divisors (5109139).

20705069 is a wasteful number, since it uses less digits than its factorization.

20705069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268915.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20705069 is about 4550.2822989349. The cubic root of 20705069 is about 274.5947485525.

The spelling of 20705069 in words is "twenty million, seven hundred five thousand, sixty-nine".