20544524 has 72 divisors (see below), whose sum is σ = 49201488. Its totient is φ = 7378560.

The previous prime is 20544523. The next prime is 20544547. The reversal of 20544524 is 42544502.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 20544493 and 20544502.

It is not an unprimeable number, because it can be changed into a prime (20544521) 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, 27662 + ... + 28394.

It is an arithmetic number, because the mean of its divisors is an integer number (683354).

Almost surely, 2^20544524 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 20544524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24600744).

20544524 is an abundant number, since it is smaller than the sum of its proper divisors (28656964).

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

20544524 is a wasteful number, since it uses less digits than its factorization.

20544524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 20544524 is about 4532.6067554995. The cubic root of 20544524 is about 273.8831796391.

The spelling of 20544524 in words is "twenty million, five hundred forty-four thousand, five hundred twenty-four".