20439552 has 80 divisors (see below), whose sum is σ = 62263872. Its totient is φ = 5836800.

The previous prime is 20439541. The next prime is 20439557. The reversal of 20439552 is 25593402.

20439552 is nontrivially palindromic in base 5.

It is not an unprimeable number, because it can be changed into a prime (20439557) 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, 9802 + ... + 11702.

Almost surely, 2^20439552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20439552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31131936).

20439552 is an abundant number, since it is smaller than the sum of its proper divisors (41824320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20439552 is an equidigital number, since it uses as much as digits as its factorization.

20439552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20439552 is about 4521.0122760285. The cubic root of 20439552 is about 273.4159152943.

It can be divided in two parts, 204 and 39552, that multiplied together give a palindrome (8068608).

The spelling of 20439552 in words is "twenty million, four hundred thirty-nine thousand, five hundred fifty-two".