21365035214577 has 16 divisors (see below), whose sum is σ = 28755154061568. Its totient is φ = 14109522836240.

The previous prime is 21365035214561. The next prime is 21365035214617. The reversal of 21365035214577 is 77541253056312.

It is a cyclic number.

It is not a de Polignac number, because 21365035214577 - 2⁴ = 21365035214561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21365035215577) 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, 48059343 + ... + 48501860.

It is an arithmetic number, because the mean of its divisors is an integer number (1797197128848).

Almost surely, 2^{21365035214577} is an apocalyptic number.

It is an amenable number.

21365035214577 is a deficient number, since it is larger than the sum of its proper divisors (7390118846991).

21365035214577 is a wasteful number, since it uses less digits than its factorization.

21365035214577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96561900.

The product of its (nonzero) digits is 5292000, while the sum is 51.

The spelling of 21365035214577 in words is "twenty-one trillion, three hundred sixty-five billion, thirty-five million, two hundred fourteen thousand, five hundred seventy-seven".