21373576653345 has 96 divisors (see below), whose sum is σ = 40521200227200. Its totient is φ = 9590655965184.

The previous prime is 21373576653329. The next prime is 21373576653421. The reversal of 21373576653345 is 54335667537312.

It is a happy number.

It is not a de Polignac number, because 21373576653345 - 2⁴ = 21373576653329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7325641 + ... + 9818969.

It is an arithmetic number, because the mean of its divisors is an integer number (422095835700).

Almost surely, 2^{21373576653345} is an apocalyptic number.

It is an amenable number.

21373576653345 is a deficient number, since it is larger than the sum of its proper divisors (19147623573855).

21373576653345 is a wasteful number, since it uses less digits than its factorization.

21373576653345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493567 (or 2493560 counting only the distinct ones).

The product of its digits is 142884000, while the sum is 60.

The spelling of 21373576653345 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred seventy-six million, six hundred fifty-three thousand, three hundred forty-five".