23212000404 has 18 divisors (see below), whose sum is σ = 58674778890. Its totient is φ = 7737333456.

The previous prime is 23212000367. The next prime is 23212000423. The reversal of 23212000404 is 40400021232.

It can be written as a sum of positive squares in only one way, i.e., 19527267600 + 3684732804 = 139740^2 + 60702^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322388859 + ... + 322388930.

Almost surely, 2^23212000404 is an apocalyptic number.

It is an amenable number.

23212000404 is an abundant number, since it is smaller than the sum of its proper divisors (35462778486).

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

23212000404 is a wasteful number, since it uses less digits than its factorization.

23212000404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644777799 (or 644777794 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 23212000404 its reverse (40400021232), we get a palindrome (63612021636).

The spelling of 23212000404 in words is "twenty-three billion, two hundred twelve million, four hundred four", and thus it is an aban number.