21045540341 has 16 divisors (see below), whose sum is σ = 24353355264. Its totient is φ = 17813259504.

The previous prime is 21045540283. The next prime is 21045540343. The reversal of 21045540341 is 14304554012.

It is a cyclic number.

It is not a de Polignac number, because 21045540341 - 2¹⁴ = 21045523957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045540343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1425986 + ... + 1440668.

It is an arithmetic number, because the mean of its divisors is an integer number (1522084704).

Almost surely, 2^21045540341 is an apocalyptic number.

It is an amenable number.

21045540341 is a deficient number, since it is larger than the sum of its proper divisors (3307814923).

21045540341 is a wasteful number, since it uses less digits than its factorization.

21045540341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17240.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 21045540341 in words is "twenty-one billion, forty-five million, five hundred forty thousand, three hundred forty-one".