21670535500355 has 8 divisors (see below), whose sum is σ = 29719591543392. Its totient is φ = 14859795771648.

The previous prime is 21670535500349. The next prime is 21670535500421. The reversal of 21670535500355 is 55300553507612.

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

It is a cyclic number.

It is not a de Polignac number, because 21670535500355 - 2²⁰ = 21670534451779 is a prime.

It is a super-2 number, since 2×21670535500355² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309579078542 + ... + 309579078611.

It is an arithmetic number, because the mean of its divisors is an integer number (3714948942924).

Almost surely, 2^{21670535500355} is an apocalyptic number.

21670535500355 is a deficient number, since it is larger than the sum of its proper divisors (8049056043037).

21670535500355 is an equidigital number, since it uses as much as digits as its factorization.

21670535500355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619158157165.

The product of its (nonzero) digits is 2362500, while the sum is 47.

The spelling of 21670535500355 in words is "twenty-one trillion, six hundred seventy billion, five hundred thirty-five million, five hundred thousand, three hundred fifty-five".