20763536 has 40 divisors (see below), whose sum is σ = 42255480. Its totient is φ = 9870336.

The previous prime is 20763493. The next prime is 20763541. The reversal of 20763536 is 63536702.

It can be written as a sum of positive squares in 4 ways, for example, as 115600 + 20647936 = 340^2 + 4544^2 .

It is a super-2 number, since 2×20763536² = 862248854446592, which contains 22 as substring.

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, 33566 + ... + 34178.

It is an arithmetic number, because the mean of its divisors is an integer number (1056387).

Almost surely, 2^20763536 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 20763536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21127740).

20763536 is an abundant number, since it is smaller than the sum of its proper divisors (21491944).

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

20763536 is a wasteful number, since it uses less digits than its factorization.

20763536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 20763536 is about 4556.7023163687. The cubic root of 20763536 is about 274.8529726463.

The spelling of 20763536 in words is "twenty million, seven hundred sixty-three thousand, five hundred thirty-six".