21160514011356 has 18 divisors (see below), whose sum is σ = 53489077084352. Its totient is φ = 7053504670440.

The previous prime is 21160514011261. The next prime is 21160514011369. The reversal of 21160514011356 is 65311041506112.

21160514011356 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 0 + 514 + 0 + 1 + 135 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 587792055871 = 21160514011356 / (2 + 1 + 1 + 6 + 0 + 5 + 1 + 4 + 0 + 1 + 1 + 3 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 21160514011356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293896027900 + ... + 293896027971.

Almost surely, 2^{21160514011356} is an apocalyptic number.

It is an amenable number.

21160514011356 is an abundant number, since it is smaller than the sum of its proper divisors (32328563072996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21160514011356 is a wasteful number, since it uses less digits than its factorization.

21160514011356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587792055881 (or 587792055876 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

Adding to 21160514011356 its reverse (65311041506112), we get a palindrome (86471555517468).

The spelling of 21160514011356 in words is "twenty-one trillion, one hundred sixty billion, five hundred fourteen million, eleven thousand, three hundred fifty-six".