20887552 has 96 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 8478720.

The previous prime is 20887549. The next prime is 20887567. The reversal of 20887552 is 25578802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444393 + ... + 444439.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^20887552 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 20887552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25159680).

20887552 is an abundant number, since it is smaller than the sum of its proper divisors (29431808).

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

20887552 is an equidigital number, since it uses as much as digits as its factorization.

20887552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 20887552 is about 4570.2901439624. The cubic root of 20887552 is about 275.3990987574.

The spelling of 20887552 in words is "twenty million, eight hundred eighty-seven thousand, five hundred fifty-two".