20537472 has 64 divisors (see below), whose sum is σ = 55324800. Its totient is φ = 6749184.

The previous prime is 20537471. The next prime is 20537483. The reversal of 20537472 is 27473502.

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

It is not an unprimeable number, because it can be changed into a prime (20537471) 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, 29998 + ... + 30674.

It is an arithmetic number, because the mean of its divisors is an integer number (864450).

Almost surely, 2^20537472 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 20537472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27662400).

20537472 is an abundant number, since it is smaller than the sum of its proper divisors (34787328).

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

20537472 is an equidigital number, since it uses as much as digits as its factorization.

20537472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20537472 is about 4531.8287699338. The cubic root of 20537472 is about 273.8518388430.

The spelling of 20537472 in words is "twenty million, five hundred thirty-seven thousand, four hundred seventy-two".