21354335312 has 10 divisors (see below), whose sum is σ = 41374024698. Its totient is φ = 10677167648.

The previous prime is 21354335309. The next prime is 21354335369. The reversal of 21354335312 is 21353345312.

It can be written as a sum of positive squares in only one way, i.e., 13910787136 + 7443548176 = 117944^2 + 86276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667322963 + ... + 667322994.

Almost surely, 2^21354335312 is an apocalyptic number.

It is an amenable number.

21354335312 is a deficient number, since it is larger than the sum of its proper divisors (20019689386).

21354335312 is a wasteful number, since it uses less digits than its factorization.

21354335312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334645965 (or 1334645959 counting only the distinct ones).

The product of its digits is 32400, while the sum is 32.

The spelling of 21354335312 in words is "twenty-one billion, three hundred fifty-four million, three hundred thirty-five thousand, three hundred twelve".