20011552 has 48 divisors (see below), whose sum is σ = 43394400. Its totient is φ = 9008640.

The previous prime is 20011547. The next prime is 20011553. The reversal of 20011552 is 25511002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20011553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48724 + ... + 49132.

It is an arithmetic number, because the mean of its divisors is an integer number (904050).

Almost surely, 2^20011552 is an apocalyptic number.

20011552 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 20011552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21697200).

20011552 is an abundant number, since it is smaller than the sum of its proper divisors (23382848).

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

20011552 is a wasteful number, since it uses less digits than its factorization.

20011552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20011552 is about 4473.4273214170. The cubic root of 20011552 is about 271.4940131878.

Adding to 20011552 its reverse (25511002), we get a palindrome (45522554).

It can be divided in two parts, 2001 and 1552, that added together give a palindrome (3553).

The spelling of 20011552 in words is "twenty million, eleven thousand, five hundred fifty-two".