21740171833684 has 24 divisors (see below), whose sum is σ = 38075313017448. Its totient is φ = 10861514342400.

The previous prime is 21740171833669. The next prime is 21740171833697. The reversal of 21740171833684 is 48633817104712.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6490928152900 + 15249243680784 = 2547730^2 + 3905028^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25536484 + ... + 26374084.

It is an arithmetic number, because the mean of its divisors is an integer number (1586471375727).

Almost surely, 2^{21740171833684} is an apocalyptic number.

It is an amenable number.

21740171833684 is a deficient number, since it is larger than the sum of its proper divisors (16335141183764).

21740171833684 is a wasteful number, since it uses less digits than its factorization.

21740171833684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842715 (or 842713 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 21740171833684 in words is "twenty-one trillion, seven hundred forty billion, one hundred seventy-one million, eight hundred thirty-three thousand, six hundred eighty-four".