23310220212 has 18 divisors (see below), whose sum is σ = 58923056738. Its totient is φ = 7770073392.

The previous prime is 23310220189. The next prime is 23310220217. The reversal of 23310220212 is 21202201332.

23310220212 is a `hidden beast` number, since 233 + 1 + 0 + 220 + 212 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18847445796 + 4462774416 = 137286^2 + 66804^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23310220217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323753023 + ... + 323753094.

Almost surely, 2^23310220212 is an apocalyptic number.

It is an amenable number.

23310220212 is an abundant number, since it is smaller than the sum of its proper divisors (35612836526).

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

23310220212 is a wasteful number, since it uses less digits than its factorization.

23310220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647506127 (or 647506122 counting only the distinct ones).

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

Adding to 23310220212 its reverse (21202201332), we get a palindrome (44512421544).

The spelling of 23310220212 in words is "twenty-three billion, three hundred ten million, two hundred twenty thousand, two hundred twelve".