21361743473 has 8 divisors (see below), whose sum is σ = 24414824448. Its totient is φ = 18309013344.

The previous prime is 21361743463. The next prime is 21361743493. The reversal of 21361743473 is 37434716312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21361743473 - 2¹⁰ = 21361742449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21361743473.

It is not an unprimeable number, because it can be changed into a prime (21361743463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59165 + ... + 214997.

It is an arithmetic number, because the mean of its divisors is an integer number (3051853056).

Almost surely, 2^21361743473 is an apocalyptic number.

It is an amenable number.

21361743473 is a deficient number, since it is larger than the sum of its proper divisors (3053080975).

21361743473 is a wasteful number, since it uses less digits than its factorization.

21361743473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175423.

The product of its digits is 254016, while the sum is 41.

The spelling of 21361743473 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-three thousand, four hundred seventy-three".