20648234 has 8 divisors (see below), whose sum is σ = 32794308. Its totient is φ = 9716800.

The previous prime is 20648233. The next prime is 20648237. The reversal of 20648234 is 43284602.

It can be written as a sum of positive squares in 2 ways, for example, as 19829209 + 819025 = 4453^2 + 905^2 .

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 = 20648197 and 20648206.

It is not an unprimeable number, because it can be changed into a prime (20648233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303617 + ... + 303684.

Almost surely, 2^20648234 is an apocalyptic number.

20648234 is a deficient number, since it is larger than the sum of its proper divisors (12146074).

20648234 is a wasteful number, since it uses less digits than its factorization.

20648234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607320.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 20648234 is about 4544.0327903746. The cubic root of 20648234 is about 274.3432659441.

The spelling of 20648234 in words is "twenty million, six hundred forty-eight thousand, two hundred thirty-four".