20569472 has 64 divisors (see below), whose sum is σ = 51114240. Its totient is φ = 8010240.

The previous prime is 20569441. The next prime is 20569487. The reversal of 20569472 is 27496502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8813 + ... + 10899.

It is an arithmetic number, because the mean of its divisors is an integer number (798660).

Almost surely, 2^20569472 is an apocalyptic number.

20569472 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 20569472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25557120).

20569472 is an abundant number, since it is smaller than the sum of its proper divisors (30544768).

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

20569472 is a wasteful number, since it uses less digits than its factorization.

20569472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20569472 is about 4535.3579792559. The cubic root of 20569472 is about 273.9939970624.

The spelling of 20569472 in words is "twenty million, five hundred sixty-nine thousand, four hundred seventy-two".