12693357921 has 16 divisors (see below), whose sum is σ = 18699168384. Its totient is φ = 7618178304.

The previous prime is 12693357917. The next prime is 12693357931. The reversal of 12693357921 is 12975339621.

It is not a de Polignac number, because 12693357921 - 2² = 12693357917 is a prime.

It is a super-3 number, since 3×12693357921³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12693357931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5409466 + ... + 5411811.

It is an arithmetic number, because the mean of its divisors is an integer number (1168698024).

Almost surely, 2^12693357921 is an apocalyptic number.

It is an amenable number.

12693357921 is a deficient number, since it is larger than the sum of its proper divisors (6005810463).

12693357921 is a wasteful number, since it uses less digits than its factorization.

12693357921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821320.

The product of its digits is 612360, while the sum is 48.

The spelling of 12693357921 in words is "twelve billion, six hundred ninety-three million, three hundred fifty-seven thousand, nine hundred twenty-one".