20427530 has 8 divisors (see below), whose sum is σ = 36769572. Its totient is φ = 8171008.

The previous prime is 20427529. The next prime is 20427541. The reversal of 20427530 is 3572402.

It can be written as a sum of positive squares in 2 ways, for example, as 17547721 + 2879809 = 4189^2 + 1697^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20427496 and 20427505.

It is an unprimeable number.

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, 1021367 + ... + 1021386.

Almost surely, 2^20427530 is an apocalyptic number.

20427530 is a deficient number, since it is larger than the sum of its proper divisors (16342042).

20427530 is a wasteful number, since it uses less digits than its factorization.

20427530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042760.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20427530 is about 4519.6825109735. The cubic root of 20427530 is about 273.3622994618.

Adding to 20427530 its reverse (3572402), we get a palindrome (23999932).

The spelling of 20427530 in words is "twenty million, four hundred twenty-seven thousand, five hundred thirty".