21367116306045 has 48 divisors (see below), whose sum is σ = 37177130822832. Its totient is φ = 11352519936000.

The previous prime is 21367116306037. The next prime is 21367116306097. The reversal of 21367116306045 is 54060361176312.

21367116306045 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 7 + 1 + 1 + 6 + 30 + 604 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3849526404441 + 17517589901604 = 1962021^2 + 4185402^2 .

It is not a de Polignac number, because 21367116306045 - 2³ = 21367116306037 is a prime.

It is a super-2 number, since 2×21367116306045² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21671295 + ... + 22635795.

It is an arithmetic number, because the mean of its divisors is an integer number (774523558809).

Almost surely, 2^{21367116306045} is an apocalyptic number.

It is an amenable number.

21367116306045 is a deficient number, since it is larger than the sum of its proper divisors (15810014516787).

21367116306045 is a wasteful number, since it uses less digits than its factorization.

21367116306045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966382 (or 966379 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 21367116306045 in words is "twenty-one trillion, three hundred sixty-seven billion, one hundred sixteen million, three hundred six thousand, forty-five".