21470667646611 has 8 divisors (see below), whose sum is σ = 29112769690560. Its totient is φ = 14071172016872.

The previous prime is 21470667646543. The next prime is 21470667646627. The reversal of 21470667646611 is 11664676607412.

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 21470667646611 - 2¹³ = 21470667638419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21470667648611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60651603345 + ... + 60651603698.

It is an arithmetic number, because the mean of its divisors is an integer number (3639096211320).

Almost surely, 2^{21470667646611} is an apocalyptic number.

21470667646611 is a deficient number, since it is larger than the sum of its proper divisors (7642102043949).

21470667646611 is a wasteful number, since it uses less digits than its factorization.

21470667646611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121303207105.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 21470667646611 in words is "twenty-one trillion, four hundred seventy billion, six hundred sixty-seven million, six hundred forty-six thousand, six hundred eleven".