20240520 has 64 divisors (see below), whose sum is σ = 62691840. Its totient is φ = 5222400.

The previous prime is 20240459. The next prime is 20240531. The reversal of 20240520 is 2504202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20240520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (979560).

Almost surely, 2^20240520 is an apocalyptic number.

20240520 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 20240520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31345920).

20240520 is an abundant number, since it is smaller than the sum of its proper divisors (42451320).

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

20240520 is a wasteful number, since it uses less digits than its factorization.

20240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486 (or 5482 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20240520 is about 4498.9465433588. The cubic root of 20240520 is about 272.5255482037.

Adding to 20240520 its reverse (2504202), we get a palindrome (22744722).

The spelling of 20240520 in words is "twenty million, two hundred forty thousand, five hundred twenty".