20430213320 has 64 divisors (see below), whose sum is σ = 51313141440. Its totient is φ = 7256390400.

The previous prime is 20430213187. The next prime is 20430213341. The reversal of 20430213320 is 2331203402.

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 = 20430213292 and 20430213301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520991 + ... + 558830.

It is an arithmetic number, because the mean of its divisors is an integer number (801767835).

Almost surely, 2^20430213320 is an apocalyptic number.

20430213320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430213320 is an abundant number, since it is smaller than the sum of its proper divisors (30882928120).

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

20430213320 is a wasteful number, since it uses less digits than its factorization.

20430213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079886 (or 1079882 counting only the distinct ones).

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

Adding to 20430213320 its reverse (2331203402), we get a palindrome (22761416722).

The spelling of 20430213320 in words is "twenty billion, four hundred thirty million, two hundred thirteen thousand, three hundred twenty".