21347320612 has 12 divisors (see below), whose sum is σ = 37438500736. Its totient is φ = 10650606120.

The previous prime is 21347320609. The next prime is 21347320619. The reversal of 21347320612 is 21602374312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21347320619) 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, 5761464 + ... + 5765167.

Almost surely, 2^21347320612 is an apocalyptic number.

It is an amenable number.

21347320612 is a deficient number, since it is larger than the sum of its proper divisors (16091180124).

21347320612 is a wasteful number, since it uses less digits than its factorization.

21347320612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527098 (or 11527096 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 21347320612 its reverse (21602374312), we get a palindrome (42949694924).

The spelling of 21347320612 in words is "twenty-one billion, three hundred forty-seven million, three hundred twenty thousand, six hundred twelve".