20532787 has 16 divisors (see below), whose sum is σ = 24969600. Its totient is φ = 16640640.

The previous prime is 20532769. The next prime is 20532791. The reversal of 20532787 is 78723502.

It is a cyclic number.

It is not a de Polignac number, because 20532787 - 2¹⁵ = 20500019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20532727) 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 15 ways as a sum of consecutive naturals, for example, 664 + ... + 6442.

It is an arithmetic number, because the mean of its divisors is an integer number (1560600).

Almost surely, 2^20532787 is an apocalyptic number.

20532787 is a deficient number, since it is larger than the sum of its proper divisors (4436813).

20532787 is a wasteful number, since it uses less digits than its factorization.

20532787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 20532787 is about 4531.3118409573. The cubic root of 20532787 is about 273.8310136016.

The spelling of 20532787 in words is "twenty million, five hundred thirty-two thousand, seven hundred eighty-seven".