20520524 has 12 divisors (see below), whose sum is σ = 35952000. Its totient is φ = 10248528.

The previous prime is 20520523. The next prime is 20520527. The reversal of 20520524 is 42502502.

It is a junction number, because it is equal to n+sod(n) for n = 20520496 and 20520505.

It is not an unprimeable number, because it can be changed into a prime (20520523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (2996000).

Almost surely, 2^20520524 is an apocalyptic number.

It is an amenable number.

20520524 is a deficient number, since it is larger than the sum of its proper divisors (15431476).

20520524 is a wasteful number, since it uses less digits than its factorization.

20520524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5870 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20520524 is about 4529.9584987061. The cubic root of 20520524 is about 273.7764884747.

The spelling of 20520524 in words is "twenty million, five hundred twenty thousand, five hundred twenty-four".