23130212220 has 36 divisors (see below), whose sum is σ = 70161644280. Its totient is φ = 6168056544.

The previous prime is 23130212213. The next prime is 23130212221. The reversal of 23130212220 is 2221203132.

23130212220 is a `hidden beast` number, since 231 + 3 + 0 + 212 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 23130212193 and 23130212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23130212221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64250410 + ... + 64250769.

Almost surely, 2^23130212220 is an apocalyptic number.

23130212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23130212220 is an abundant number, since it is smaller than the sum of its proper divisors (47031432060).

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

23130212220 is a wasteful number, since it uses less digits than its factorization.

23130212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128501194 (or 128501189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23130212220 its reverse (2221203132), we get a palindrome (25351415352).

The spelling of 23130212220 in words is "twenty-three billion, one hundred thirty million, two hundred twelve thousand, two hundred twenty".