20888472 has 48 divisors (see below), whose sum is σ = 57408120. Its totient is φ = 6328960.

The previous prime is 20888449. The next prime is 20888473. The reversal of 20888472 is 27488802.

It is a self number, because there is not a number n which added to its sum of digits gives 20888472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20888473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 693 + ... + 6500.

Almost surely, 2^20888472 is an apocalyptic number.

20888472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20888472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28704060).

20888472 is an abundant number, since it is smaller than the sum of its proper divisors (36519648).

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

20888472 is a wasteful number, since it uses less digits than its factorization.

20888472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7224 (or 7209 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 20888472 is about 4570.3907929191. The cubic root of 20888472 is about 275.4031420499.

The spelling of 20888472 in words is "twenty million, eight hundred eighty-eight thousand, four hundred seventy-two".