21034433412 has 36 divisors (see below), whose sum is σ = 53211676336. Its totient is φ = 7006031280.

The previous prime is 21034433411. The next prime is 21034433419. The reversal of 21034433412 is 21433443012.

21034433412 is a `hidden beast` number, since 210 + 3 + 4 + 4 + 33 + 412 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21034433411) 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, 179818 + ... + 272769.

Almost surely, 2^21034433412 is an apocalyptic number.

It is an amenable number.

21034433412 is an abundant number, since it is smaller than the sum of its proper divisors (32177242924).

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

21034433412 is a wasteful number, since it uses less digits than its factorization.

21034433412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453888 (or 453883 counting only the distinct ones).

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

Adding to 21034433412 its reverse (21433443012), we get a palindrome (42467876424).

The spelling of 21034433412 in words is "twenty-one billion, thirty-four million, four hundred thirty-three thousand, four hundred twelve".