20430032220 has 120 divisors (see below), whose sum is σ = 69019821024. Its totient is φ = 5028925824.

The previous prime is 20430032197. The next prime is 20430032263. The reversal of 20430032220 is 2223003402.

20430032220 is a `hidden beast` number, since 20 + 4 + 300 + 322 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20430032193 and 20430032202.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 463984 + ... + 506103.

Almost surely, 2^20430032220 is an apocalyptic number.

20430032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430032220 is an abundant number, since it is smaller than the sum of its proper divisors (48589788804).

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

20430032220 is a wasteful number, since it uses less digits than its factorization.

20430032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970121 (or 970110 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20430032220 its reverse (2223003402), we get a palindrome (22653035622).

The spelling of 20430032220 in words is "twenty billion, four hundred thirty million, thirty-two thousand, two hundred twenty".