20735545 has 8 divisors (see below), whose sum is σ = 25489800. Its totient is φ = 16183680.

The previous prime is 20735537. The next prime is 20735557. The reversal of 20735545 is 54553702.

It can be written as a sum of positive squares in 4 ways, for example, as 3396649 + 17338896 = 1843^2 + 4164^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20735545 - 2³ = 20735537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50370 + ... + 50779.

It is an arithmetic number, because the mean of its divisors is an integer number (3186225).

Almost surely, 2^20735545 is an apocalyptic number.

It is an amenable number.

20735545 is a deficient number, since it is larger than the sum of its proper divisors (4754255).

20735545 is a wasteful number, since it uses less digits than its factorization.

20735545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101195.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 20735545 is about 4553.6298707734. The cubic root of 20735545 is about 274.7294087653.

The spelling of 20735545 in words is "twenty million, seven hundred thirty-five thousand, five hundred forty-five".