20703564 has 72 divisors (see below), whose sum is σ = 61894560. Its totient is φ = 5709312.

The previous prime is 20703563. The next prime is 20703589. The reversal of 20703564 is 46530702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20703563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5892 + ... + 8724.

Almost surely, 2^20703564 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 20703564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30947280).

20703564 is an abundant number, since it is smaller than the sum of its proper divisors (41190996).

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

20703564 is a wasteful number, since it uses less digits than its factorization.

20703564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20703564 is about 4550.1169215747. The cubic root of 20703564 is about 274.5880951880.

The spelling of 20703564 in words is "twenty million, seven hundred three thousand, five hundred sixty-four".