21867925359673 has 8 divisors (see below), whose sum is σ = 23236673466600. Its totient is φ = 20508332759040.

The previous prime is 21867925359667. The next prime is 21867925359719. The reversal of 21867925359673 is 37695352976812.

It can be written as a sum of positive squares in 4 ways, for example, as 2932303485609 + 18935621874064 = 1712397^2 + 4351508^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21867925359673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21867925359596 and 21867925359605.

It is not an unprimeable number, because it can be changed into a prime (21867925359613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2288871648 + ... + 2288881201.

It is an arithmetic number, because the mean of its divisors is an integer number (2904584183325).

Almost surely, 2^{21867925359673} is an apocalyptic number.

It is an amenable number.

21867925359673 is a deficient number, since it is larger than the sum of its proper divisors (1368748106927).

21867925359673 is a wasteful number, since it uses less digits than its factorization.

21867925359673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577753147.

The product of its digits is 1028764800, while the sum is 73.

The spelling of 21867925359673 in words is "twenty-one trillion, eight hundred sixty-seven billion, nine hundred twenty-five million, three hundred fifty-nine thousand, six hundred seventy-three".