20470613 has 4 divisors (see below), whose sum is σ = 20525868. Its totient is φ = 20415360.

The previous prime is 20470573. The next prime is 20470627. The reversal of 20470613 is 31607402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5276209 + 15194404 = 2297^2 + 3898^2 .

It is a cyclic number.

It is not a de Polignac number, because 20470613 - 2²⁴ = 3693397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475613) 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, 27068 + ... + 27813.

It is an arithmetic number, because the mean of its divisors is an integer number (5131467).

Almost surely, 2^20470613 is an apocalyptic number.

It is an amenable number.

20470613 is a deficient number, since it is larger than the sum of its proper divisors (55255).

20470613 is an equidigital number, since it uses as much as digits as its factorization.

20470613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55254.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20470613 is about 4524.4461539508. The cubic root of 20470613 is about 273.5543441838.

The spelling of 20470613 in words is "twenty million, four hundred seventy thousand, six hundred thirteen".