20743706 has 32 divisors (see below), whose sum is σ = 35069760. Its totient is φ = 9144576.

The previous prime is 20743703. The next prime is 20743711. The reversal of 20743706 is 60734702.

It is a super-3 number, since 3×20743706³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20743703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105200 + ... + 105396.

It is an arithmetic number, because the mean of its divisors is an integer number (1095930).

Almost surely, 2^20743706 is an apocalyptic number.

20743706 is a deficient number, since it is larger than the sum of its proper divisors (14326054).

20743706 is a wasteful number, since it uses less digits than its factorization.

20743706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20743706 is about 4554.5258809233. The cubic root of 20743706 is about 274.7654462817.

The spelling of 20743706 in words is "twenty million, seven hundred forty-three thousand, seven hundred six".