21042067276 has 12 divisors (see below), whose sum is σ = 36941267272. Its totient is φ = 10487419488.

The previous prime is 21042067259. The next prime is 21042067279. The reversal of 21042067276 is 67276024012.

It is not an unprimeable number, because it can be changed into a prime (21042067279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8402130 + ... + 8404633.

Almost surely, 2^21042067276 is an apocalyptic number.

It is an amenable number.

21042067276 is a deficient number, since it is larger than the sum of its proper divisors (15899199996).

21042067276 is a wasteful number, since it uses less digits than its factorization.

21042067276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807080 (or 16807078 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 21042067276 in words is "twenty-one billion, forty-two million, sixty-seven thousand, two hundred seventy-six".