21983736693 has 16 divisors (see below), whose sum is σ = 29518632000. Its totient is φ = 14552401920.

The previous prime is 21983736673. The next prime is 21983736701. The reversal of 21983736693 is 39663738912.

It is a happy number.

It is not a de Polignac number, because 21983736693 - 2¹⁷ = 21983605621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21983736623) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1628853 + ... + 1642293.

It is an arithmetic number, because the mean of its divisors is an integer number (1844914500).

Almost surely, 2^21983736693 is an apocalyptic number.

It is an amenable number.

21983736693 is a deficient number, since it is larger than the sum of its proper divisors (7534895307).

21983736693 is a wasteful number, since it uses less digits than its factorization.

21983736693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17252.

The product of its digits is 8817984, while the sum is 57.

The spelling of 21983736693 in words is "twenty-one billion, nine hundred eighty-three million, seven hundred thirty-six thousand, six hundred ninety-three".