20520526 has 8 divisors (see below), whose sum is σ = 33148584. Its totient is φ = 9471000.

The previous prime is 20520523. The next prime is 20520527. The reversal of 20520526 is 62502502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20520497 and 20520506.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394600 + ... + 394651.

It is an arithmetic number, because the mean of its divisors is an integer number (4143573).

Almost surely, 2^20520526 is an apocalyptic number.

20520526 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20520526 is a deficient number, since it is larger than the sum of its proper divisors (12628058).

20520526 is a wasteful number, since it uses less digits than its factorization.

20520526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789266.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20520526 is about 4529.9587194587. The cubic root of 20520526 is about 273.7764973691.

The spelling of 20520526 in words is "twenty million, five hundred twenty thousand, five hundred twenty-six".