20881152 has 180 divisors, whose sum is σ = 66777480. Its totient is φ = 6469632.

The previous prime is 20881141. The next prime is 20881163. The reversal of 20881152 is 25118802.

It is an interprime number because it is at equal distance from previous prime (20881141) and next prime (20881163).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 393958 + ... + 394010.

It is an arithmetic number, because the mean of its divisors is an integer number (370986).

Almost surely, 2^20881152 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 20881152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33388740).

20881152 is an abundant number, since it is smaller than the sum of its proper divisors (45896328).

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

20881152 is an equidigital number, since it uses as much as digits as its factorization.

20881152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 20881152 is about 4569.5899159553. The cubic root of 20881152 is about 275.3709682185.

Adding to 20881152 its reverse (25118802), we get a palindrome (45999954).

It can be divided in two parts, 2088 and 1152, that added together give a triangular number (3240 = T₈₀).

The spelling of 20881152 in words is "twenty million, eight hundred eighty-one thousand, one hundred fifty-two".