20261552 has 40 divisors (see below), whose sum is σ = 41912496. Its totient is φ = 9455616.

The previous prime is 20261519. The next prime is 20261567. The reversal of 20261552 is 25516202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44108 + ... + 44564.

Almost surely, 2^20261552 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 20261552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20956248).

20261552 is an abundant number, since it is smaller than the sum of its proper divisors (21650944).

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

20261552 is a wasteful number, since it uses less digits than its factorization.

20261552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20261552 is about 4501.2833725505. The cubic root of 20261552 is about 272.6199096327.

Adding to 20261552 its reverse (25516202), we get a palindrome (45777754).

The spelling of 20261552 in words is "twenty million, two hundred sixty-one thousand, five hundred fifty-two".