21375602312 has 8 divisors (see below), whose sum is σ = 40079254350. Its totient is φ = 10687801152.

The previous prime is 21375602309. The next prime is 21375602317. The reversal of 21375602312 is 21320657312.

It can be written as a sum of positive squares in only one way, i.e., 20367285796 + 1008316516 = 142714^2 + 31754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×21375602312³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21375602317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335975137 + ... + 1335975152.

Almost surely, 2^21375602312 is an apocalyptic number.

It is an amenable number.

21375602312 is a deficient number, since it is larger than the sum of its proper divisors (18703652038).

21375602312 is a wasteful number, since it uses less digits than its factorization.

21375602312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671950295 (or 2671950291 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 21375602312 in words is "twenty-one billion, three hundred seventy-five million, six hundred two thousand, three hundred twelve".