21356160514044 has 24 divisors (see below), whose sum is σ = 50513658204240. Its totient is φ = 7021203456384.

The previous prime is 21356160514027. The next prime is 21356160514093. The reversal of 21356160514044 is 44041506165312.

It is a super-2 number, since 2×21356160514044² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21356160513987 and 21356160514005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12189588459 + ... + 12189590210.

It is an arithmetic number, because the mean of its divisors is an integer number (2104735758510).

Almost surely, 2^{21356160514044} is an apocalyptic number.

It is an amenable number.

21356160514044 is an abundant number, since it is smaller than the sum of its proper divisors (29157497690196).

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

21356160514044 is a wasteful number, since it uses less digits than its factorization.

21356160514044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24379178749 (or 24379178747 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

Adding to 21356160514044 its reverse (44041506165312), we get a palindrome (65397666679356).

The spelling of 21356160514044 in words is "twenty-one trillion, three hundred fifty-six billion, one hundred sixty million, five hundred fourteen thousand, forty-four".