20740735 has 4 divisors (see below), whose sum is σ = 24888888. Its totient is φ = 16592584.

The previous prime is 20740729. The next prime is 20740747. The reversal of 20740735 is 53704702.

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 20740735 - 2⁵ = 20740703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2074069 + ... + 2074078.

It is an arithmetic number, because the mean of its divisors is an integer number (6222222).

Almost surely, 2^20740735 is an apocalyptic number.

20740735 is a deficient number, since it is larger than the sum of its proper divisors (4148153).

20740735 is an equidigital number, since it uses as much as digits as its factorization.

20740735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148152.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20740735 is about 4554.1997101576. The cubic root of 20740735 is about 274.7523279714.

The spelling of 20740735 in words is "twenty million, seven hundred forty thousand, seven hundred thirty-five".