21460666411 has 4 divisors (see below), whose sum is σ = 21624488424. Its totient is φ = 21296844400.

The previous prime is 21460666393. The next prime is 21460666427. The reversal of 21460666411 is 11466606412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21460666411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21460666441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81910810 + ... + 81911071.

It is an arithmetic number, because the mean of its divisors is an integer number (5406122106).

Almost surely, 2^21460666411 is an apocalyptic number.

21460666411 is a deficient number, since it is larger than the sum of its proper divisors (163822013).

21460666411 is a wasteful number, since it uses less digits than its factorization.

21460666411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163822012.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 21460666411 in words is "twenty-one billion, four hundred sixty million, six hundred sixty-six thousand, four hundred eleven".