20525562 has 80 divisors (see below), whose sum is σ = 50573160. Its totient is φ = 6193152.

The previous prime is 20525551. The next prime is 20525563. The reversal of 20525562 is 26552502.

It can be written as a sum of positive squares in 4 ways, for example, as 20331081 + 194481 = 4509^2 + 441^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20525563) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 79738 + ... + 79994.

Almost surely, 2^20525562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20525562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25286580).

20525562 is an abundant number, since it is smaller than the sum of its proper divisors (30047598).

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

20525562 is a wasteful number, since it uses less digits than its factorization.

20525562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 20525562 is about 4530.5145403144. The cubic root of 20525562 is about 273.7988916240.

The spelling of 20525562 in words is "twenty million, five hundred twenty-five thousand, five hundred sixty-two".