20451230 has 32 divisors (see below), whose sum is σ = 38016000. Its totient is φ = 7916832.

The previous prime is 20451203. The next prime is 20451241. The reversal of 20451230 is 3215402.

It is a junction number, because it is equal to n+sod(n) for n = 20451199 and 20451208.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 85451 + ... + 85689.

It is an arithmetic number, because the mean of its divisors is an integer number (1188000).

Almost surely, 2^20451230 is an apocalyptic number.

20451230 is a deficient number, since it is larger than the sum of its proper divisors (17564770).

20451230 is a wasteful number, since it uses less digits than its factorization.

20451230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20451230 is about 4522.3036165211. The cubic root of 20451230 is about 273.4679768261.

Adding to 20451230 its reverse (3215402), we get a palindrome (23666632).

The spelling of 20451230 in words is "twenty million, four hundred fifty-one thousand, two hundred thirty".