21740689485 has 48 divisors (see below), whose sum is σ = 39759932160. Its totient is φ = 10959096960.

The previous prime is 21740689457. The next prime is 21740689541. The reversal of 21740689485 is 58498604712.

It is a happy number.

It is not a de Polignac number, because 21740689485 - 2¹⁹ = 21740165197 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 339007 + ... + 398003.

It is an arithmetic number, because the mean of its divisors is an integer number (828331920).

Almost surely, 2^21740689485 is an apocalyptic number.

It is an amenable number.

21740689485 is a deficient number, since it is larger than the sum of its proper divisors (18019242675).

21740689485 is a wasteful number, since it uses less digits than its factorization.

21740689485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59458 (or 59455 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 21740689485 in words is "twenty-one billion, seven hundred forty million, six hundred eighty-nine thousand, four hundred eighty-five".