20532439 has 8 divisors (see below), whose sum is σ = 20916720. Its totient is φ = 20151936.

The previous prime is 20532437. The next prime is 20532461. The reversal of 20532439 is 93423502.

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

It is a cyclic number.

It is not a de Polignac number, because 20532439 - 2¹ = 20532437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11484 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (2614590).

Almost surely, 2^20532439 is an apocalyptic number.

20532439 is a deficient number, since it is larger than the sum of its proper divisors (384281).

20532439 is a wasteful number, since it uses less digits than its factorization.

20532439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20532439 is about 4531.2734413187. The cubic root of 20532439 is about 273.8294665843.

The spelling of 20532439 in words is "twenty million, five hundred thirty-two thousand, four hundred thirty-nine".