21616670733803 has 16 divisors (see below), whose sum is σ = 22283729233920. Its totient is φ = 20958256935936.

The previous prime is 21616670733793. The next prime is 21616670733857. The reversal of 21616670733803 is 30833707661612.

It is a cyclic number.

It is not a de Polignac number, because 21616670733803 - 2¹⁸ = 21616670471659 is a prime.

It is a super-2 number, since 2×21616670733803² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21616670753803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180828350 + ... + 180947852.

It is an arithmetic number, because the mean of its divisors is an integer number (1392733077120).

Almost surely, 2^{21616670733803} is an apocalyptic number.

21616670733803 is a deficient number, since it is larger than the sum of its proper divisors (667058500117).

21616670733803 is a wasteful number, since it uses less digits than its factorization.

21616670733803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155626.

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 21616670733803 in words is "twenty-one trillion, six hundred sixteen billion, six hundred seventy million, seven hundred thirty-three thousand, eight hundred three".