20108672 has 32 divisors (see below), whose sum is σ = 40408320. Its totient is φ = 9967104.

The previous prime is 20108657. The next prime is 20108729. The reversal of 20108672 is 27680102.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15638 + ... + 16874.

It is an arithmetic number, because the mean of its divisors is an integer number (1262760).

Almost surely, 2^20108672 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 20108672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20204160).

20108672 is an abundant number, since it is smaller than the sum of its proper divisors (20299648).

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

20108672 is a wasteful number, since it uses less digits than its factorization.

20108672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20108672 is about 4484.2693942269. The cubic root of 20108672 is about 271.9325092066.

Adding to 20108672 its reverse (27680102), we get a palindrome (47788774).

The spelling of 20108672 in words is "twenty million, one hundred eight thousand, six hundred seventy-two".