20574513 has 16 divisors (see below), whose sum is σ = 30764800. Its totient is φ = 13588560.

The previous prime is 20574493. The next prime is 20574517. The reversal of 20574513 is 31547502.

It is a happy number.

20574513 is a `hidden beast` number, since 205 + 7 + 451 + 3 = 666.

It is not a de Polignac number, because 20574513 - 2²⁰ = 19525937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20574517) 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 15 ways as a sum of consecutive naturals, for example, 553 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (1922800).

Almost surely, 2^20574513 is an apocalyptic number.

It is an amenable number.

20574513 is a deficient number, since it is larger than the sum of its proper divisors (10190287).

20574513 is a wasteful number, since it uses less digits than its factorization.

20574513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7109 (or 7103 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20574513 is about 4535.9136896550. The cubic root of 20574513 is about 274.0163779792.

The spelling of 20574513 in words is "twenty million, five hundred seventy-four thousand, five hundred thirteen".