30643204212 has 18 divisors (see below), whose sum is σ = 77459210738. Its totient is φ = 10214401392.

The previous prime is 30643204187. The next prime is 30643204217. The reversal of 30643204212 is 21240234603.

30643204212 is a `hidden beast` number, since 3 + 0 + 643 + 2 + 0 + 4 + 2 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30640401936 + 2802276 = 175044^2 + 1674^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643204217) 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, 425600023 + ... + 425600094.

Almost surely, 2^30643204212 is an apocalyptic number.

It is an amenable number.

30643204212 is an abundant number, since it is smaller than the sum of its proper divisors (46816006526).

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

30643204212 is a wasteful number, since it uses less digits than its factorization.

30643204212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851200127 (or 851200122 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 30643204212 its reverse (21240234603), we get a palindrome (51883438815).

The spelling of 30643204212 in words is "thirty billion, six hundred forty-three million, two hundred four thousand, two hundred twelve".