20535747 has 8 divisors (see below), whose sum is σ = 27525120. Its totient is φ = 13618440.

The previous prime is 20535737. The next prime is 20535791. The reversal of 20535747 is 74753502.

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

It is not a de Polignac number, because 20535747 - 2⁴ = 20535731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20535707) by changing a digit.

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, 17347 + ... + 18492.

It is an arithmetic number, because the mean of its divisors is an integer number (3440640).

Almost surely, 2^20535747 is an apocalyptic number.

20535747 is a deficient number, since it is larger than the sum of its proper divisors (6989373).

20535747 is a wasteful number, since it uses less digits than its factorization.

20535747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36033.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 20535747 is about 4531.6384454191. The cubic root of 20535747 is about 273.8441714331.

The spelling of 20535747 in words is "twenty million, five hundred thirty-five thousand, seven hundred forty-seven".