20746735 has 4 divisors (see below), whose sum is σ = 24896088. Its totient is φ = 16597384.

The previous prime is 20746721. The next prime is 20746777. The reversal of 20746735 is 53764702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20746735 - 2¹¹ = 20744687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20746735.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074669 + ... + 2074678.

It is an arithmetic number, because the mean of its divisors is an integer number (6224022).

Almost surely, 2^20746735 is an apocalyptic number.

20746735 is a deficient number, since it is larger than the sum of its proper divisors (4149353).

20746735 is an equidigital number, since it uses as much as digits as its factorization.

20746735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149352.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20746735 is about 4554.8583951644. The cubic root of 20746735 is about 274.7788193988.

The spelling of 20746735 in words is "twenty million, seven hundred forty-six thousand, seven hundred thirty-five".