20520514 has 12 divisors (see below), whose sum is σ = 35806374. Its totient is φ = 8794464.

The previous prime is 20520509. The next prime is 20520517. The reversal of 20520514 is 41502502.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 3980025 = 4067^2 + 1995^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20520491 and 20520500.

It is not an unprimeable number, because it can be changed into a prime (20520517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104599 + ... + 104794.

Almost surely, 2^20520514 is an apocalyptic number.

20520514 is a deficient number, since it is larger than the sum of its proper divisors (15285860).

20520514 is a wasteful number, since it uses less digits than its factorization.

20520514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209409 (or 209402 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20520514 is about 4529.9573949431. The cubic root of 20520514 is about 273.7764440027.

The spelling of 20520514 in words is "twenty million, five hundred twenty thousand, five hundred fourteen".