21183960123 has 6 divisors (see below), whose sum is σ = 30599053524. Its totient is φ = 14122640076.

The previous prime is 21183960067. The next prime is 21183960137. The reversal of 21183960123 is 32106938112.

21183960123 is a `hidden beast` number, since 2 + 1 + 18 + 39 + 601 + 2 + 3 = 666.

It is not a de Polignac number, because 21183960123 - 2¹⁶ = 21183894587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21183960163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1176886665 + ... + 1176886682.

It is an arithmetic number, because the mean of its divisors is an integer number (5099842254).

Almost surely, 2^21183960123 is an apocalyptic number.

21183960123 is a deficient number, since it is larger than the sum of its proper divisors (9415093401).

21183960123 is a wasteful number, since it uses less digits than its factorization.

21183960123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353773353 (or 2353773350 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 21183960123 in words is "twenty-one billion, one hundred eighty-three million, nine hundred sixty thousand, one hundred twenty-three".