20019072 has 64 divisors (see below), whose sum is σ = 54651600. Its totient is φ = 6488064.

The previous prime is 20019061. The next prime is 20019073. The reversal of 20019072 is 27091002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019073) by changing a digit.

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, 13504 + ... + 14912.

Almost surely, 2^20019072 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 20019072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27325800).

20019072 is an abundant number, since it is smaller than the sum of its proper divisors (34632528).

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

20019072 is a wasteful number, since it uses less digits than its factorization.

20019072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 20019072 is about 4474.2677613214. The cubic root of 20019072 is about 271.5280165357.

The spelling of 20019072 in words is "twenty million, nineteen thousand, seventy-two".