21481696866692 has 12 divisors (see below), whose sum is σ = 37593065472396. Its totient is φ = 10740821017440.

The previous prime is 21481696866653. The next prime is 21481696866703. The reversal of 21481696866692 is 29666869618412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17624345874496 + 3857350992196 = 4198136^2 + 1964014^2 .

It is a super-2 number, since 2×21481696866692² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5037503 + ... + 8266790.

It is an arithmetic number, because the mean of its divisors is an integer number (3132755456033).

Almost surely, 2^{21481696866692} is an apocalyptic number.

It is an amenable number.

21481696866692 is a deficient number, since it is larger than the sum of its proper divisors (16111368605704).

21481696866692 is a wasteful number, since it uses less digits than its factorization.

21481696866692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13707958 (or 13707956 counting only the distinct ones).

The product of its digits is 644972544, while the sum is 74.

The spelling of 21481696866692 in words is "twenty-one trillion, four hundred eighty-one billion, six hundred ninety-six million, eight hundred sixty-six thousand, six hundred ninety-two".