20427913 has 8 divisors (see below), whose sum is σ = 22337280. Its totient is φ = 18527280.

The previous prime is 20427871. The next prime is 20427917. The reversal of 20427913 is 31972402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20427913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20427917) 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 7 ways as a sum of consecutive naturals, for example, 3331 + ... + 7207.

It is an arithmetic number, because the mean of its divisors is an integer number (2792160).

Almost surely, 2^20427913 is an apocalyptic number.

It is an amenable number.

20427913 is a deficient number, since it is larger than the sum of its proper divisors (1909367).

20427913 is a wasteful number, since it uses less digits than its factorization.

20427913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20427913 is about 4519.7248810077. The cubic root of 20427913 is about 273.3640078933.

The spelling of 20427913 in words is "twenty million, four hundred twenty-seven thousand, nine hundred thirteen".