20536544 has 48 divisors (see below), whose sum is σ = 48934368. Its totient is φ = 8282112.

The previous prime is 20536519. The next prime is 20536547. The reversal of 20536544 is 44563502.

20536544 = 355² + 356² + ... + 473².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20536547) 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, 1112 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (1019466).

Almost surely, 2^20536544 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 20536544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24467184).

20536544 is an abundant number, since it is smaller than the sum of its proper divisors (28397824).

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

20536544 is a wasteful number, since it uses less digits than its factorization.

20536544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427 (or 5419 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20536544 is about 4531.7263818549. The cubic root of 20536544 is about 273.8477140521.

The spelling of 20536544 in words is "twenty million, five hundred thirty-six thousand, five hundred forty-four".