20532747 has 4 divisors (see below), whose sum is σ = 27377000. Its totient is φ = 13688496.

The previous prime is 20532737. The next prime is 20532751. The reversal of 20532747 is 74723502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20532747 - 2⁴ = 20532731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422122 + ... + 3422127.

It is an arithmetic number, because the mean of its divisors is an integer number (6844250).

Almost surely, 2^20532747 is an apocalyptic number.

20532747 is a deficient number, since it is larger than the sum of its proper divisors (6844253).

20532747 is an equidigital number, since it uses as much as digits as its factorization.

20532747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844252.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20532747 is about 4531.3074272223. The cubic root of 20532747 is about 273.8308357844.

The spelling of 20532747 in words is "twenty million, five hundred thirty-two thousand, seven hundred forty-seven".