20738735 has 4 divisors (see below), whose sum is σ = 24886488. Its totient is φ = 16590984.

The previous prime is 20738723. The next prime is 20738749. The reversal of 20738735 is 53783702.

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 20738735 - 2¹⁶ = 20673199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20738695 and 20738704.

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, 2073869 + ... + 2073878.

It is an arithmetic number, because the mean of its divisors is an integer number (6221622).

Almost surely, 2^20738735 is an apocalyptic number.

20738735 is a deficient number, since it is larger than the sum of its proper divisors (4147753).

20738735 is an equidigital number, since it uses as much as digits as its factorization.

20738735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147752.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 20738735 is about 4553.9801273172. The cubic root of 20738735 is about 274.7434963602.

The spelling of 20738735 in words is "twenty million, seven hundred thirty-eight thousand, seven hundred thirty-five".