21168416841 has 32 divisors (see below), whose sum is σ = 33378616320. Its totient is φ = 11764008000.

The previous prime is 21168416837. The next prime is 21168416869. The reversal of 21168416841 is 14861486112.

It is not a de Polignac number, because 21168416841 - 2² = 21168416837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21168416793 and 21168416802.

It is not an unprimeable number, because it can be changed into a prime (21168416041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98611 + ... + 228168.

It is an arithmetic number, because the mean of its divisors is an integer number (1043081760).

Almost surely, 2^21168416841 is an apocalyptic number.

It is an amenable number.

21168416841 is a deficient number, since it is larger than the sum of its proper divisors (12210199479).

21168416841 is a wasteful number, since it uses less digits than its factorization.

21168416841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326957.

The product of its digits is 73728, while the sum is 42.

The spelling of 21168416841 in words is "twenty-one billion, one hundred sixty-eight million, four hundred sixteen thousand, eight hundred forty-one".