21360004535 has 16 divisors (see below), whose sum is σ = 28568181600. Its totient is φ = 15236361216.

The previous prime is 21360004517. The next prime is 21360004537. The reversal of 21360004535 is 53540006312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21360004535 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21360004498 and 21360004507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21360004537) 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, 6611390 + ... + 6614619.

It is an arithmetic number, because the mean of its divisors is an integer number (1785511350).

Almost surely, 2^21360004535 is an apocalyptic number.

21360004535 is a deficient number, since it is larger than the sum of its proper divisors (7208177065).

21360004535 is a wasteful number, since it uses less digits than its factorization.

21360004535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13226050.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 21360004535 in words is "twenty-one billion, three hundred sixty million, four thousand, five hundred thirty-five".