20430123320 has 32 divisors (see below), whose sum is σ = 48671766000. Its totient is φ = 7691340288.

The previous prime is 20430123281. The next prime is 20430123323. The reversal of 20430123320 is 2332103402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20430123292 and 20430123301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430123323) 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, 15021470 + ... + 15022829.

Almost surely, 2^20430123320 is an apocalyptic number.

20430123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430123320 is an abundant number, since it is smaller than the sum of its proper divisors (28241642680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20430123320 is a wasteful number, since it uses less digits than its factorization.

20430123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30044327 (or 30044323 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20430123320 its reverse (2332103402), we get a palindrome (22762226722).

The spelling of 20430123320 in words is "twenty billion, four hundred thirty million, one hundred twenty-three thousand, three hundred twenty".