20523060 has 72 divisors (see below), whose sum is σ = 62866440. Its totient is φ = 5419008.

The previous prime is 20523053. The next prime is 20523077. The reversal of 20523060 is 6032502.

It can be written as a sum of positive squares in 4 ways, for example, as 219024 + 20304036 = 468^2 + 4506^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19836 + ... + 20844.

It is an arithmetic number, because the mean of its divisors is an integer number (873145).

Almost surely, 2^20523060 is an apocalyptic number.

20523060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20523060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31433220).

20523060 is an abundant number, since it is smaller than the sum of its proper divisors (42343380).

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

20523060 is a wasteful number, since it uses less digits than its factorization.

20523060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20523060 is about 4530.2384043227. The cubic root of 20523060 is about 273.7877661038.

Adding to 20523060 its reverse (6032502), we get a palindrome (26555562).

The spelling of 20523060 in words is "twenty million, five hundred twenty-three thousand, sixty".