20262321 has 6 divisors (see below), whose sum is σ = 29267810. Its totient is φ = 13508208.

The previous prime is 20262301. The next prime is 20262343. The reversal of 20262321 is 12326202.

20262321 is a `hidden beast` number, since 20 + 2 + 623 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 12321 = 4500^2 + 111^2 .

It is not a de Polignac number, because 20262321 - 2⁶ = 20262257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20262294 and 20262303.

It is not an unprimeable number, because it can be changed into a prime (20262301) 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 5 ways as a sum of consecutive naturals, for example, 1125676 + ... + 1125693.

Almost surely, 2^20262321 is an apocalyptic number.

It is an amenable number.

20262321 is a deficient number, since it is larger than the sum of its proper divisors (9005489).

20262321 is a wasteful number, since it uses less digits than its factorization.

20262321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251375 (or 2251372 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20262321 is about 4501.3687918232. The cubic root of 20262321 is about 272.6233585633.

Adding to 20262321 its reverse (12326202), we get a palindrome (32588523).

The spelling of 20262321 in words is "twenty million, two hundred sixty-two thousand, three hundred twenty-one".