20522513 has 8 divisors (see below), whose sum is σ = 22480416. Its totient is φ = 18580000.

The previous prime is 20522507. The next prime is 20522521. The reversal of 20522513 is 31522502.

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

It is a cyclic number.

It is not a de Polignac number, because 20522513 - 2⁶ = 20522449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (2810052).

Almost surely, 2^20522513 is an apocalyptic number.

It is an amenable number.

20522513 is a deficient number, since it is larger than the sum of its proper divisors (1957903).

20522513 is a wasteful number, since it uses less digits than its factorization.

20522513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20522513 is about 4530.1780318217. The cubic root of 20522513 is about 273.7853336654.

The spelling of 20522513 in words is "twenty million, five hundred twenty-two thousand, five hundred thirteen".