20730735 has 40 divisors (see below), whose sum is σ = 39360816. Its totient is φ = 10402560.

The previous prime is 20730733. The next prime is 20730739. The reversal of 20730735 is 53703702.

It is not a de Polignac number, because 20730735 - 2¹ = 20730733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20730699 and 20730708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730733) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5380 + ... + 8390.

Almost surely, 2^20730735 is an apocalyptic number.

20730735 is a deficient number, since it is larger than the sum of its proper divisors (18630081).

20730735 is a wasteful number, since it uses less digits than its factorization.

20730735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3036 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 20730735 is about 4553.1016900570. The cubic root of 20730735 is about 274.7081642365.

The spelling of 20730735 in words is "twenty million, seven hundred thirty thousand, seven hundred thirty-five".