20430220451 has 8 divisors (see below), whose sum is σ = 20452726800. Its totient is φ = 20407730560.

The previous prime is 20430220399. The next prime is 20430220453. The reversal of 20430220451 is 15402203402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20430220451 - 2⁶ = 20430220387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430220453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6879695 + ... + 6882663.

It is an arithmetic number, because the mean of its divisors is an integer number (2556590850).

Almost surely, 2^20430220451 is an apocalyptic number.

20430220451 is a deficient number, since it is larger than the sum of its proper divisors (22506349).

20430220451 is a wasteful number, since it uses less digits than its factorization.

20430220451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20430220451 its reverse (15402203402), we get a palindrome (35832423853).

The spelling of 20430220451 in words is "twenty billion, four hundred thirty million, two hundred twenty thousand, four hundred fifty-one".