20019552 has 96 divisors (see below), whose sum is σ = 62060544. Its totient is φ = 5535360.

The previous prime is 20019547. The next prime is 20019577. The reversal of 20019552 is 25591002.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 645777 + ... + 645807.

It is an arithmetic number, because the mean of its divisors is an integer number (646464).

Almost surely, 2^20019552 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 20019552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31030272).

20019552 is an abundant number, since it is smaller than the sum of its proper divisors (42040992).

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

20019552 is an frugal number, since it uses more digits than its factorization.

20019552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 20019552 is about 4474.3214010618. The cubic root of 20019552 is about 271.5301866730.

The spelling of 20019552 in words is "twenty million, nineteen thousand, five hundred fifty-two".