21486467 has 2 divisors, whose sum is σ = 21486468. Its totient is φ = 21486466.

The previous prime is 21486463. The next prime is 21486523. The reversal of 21486467 is 76468412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21486467 - 2² = 21486463 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21486467.

It is not a weakly prime, because it can be changed into another prime (21486461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10743233 + 10743234.

It is an arithmetic number, because the mean of its divisors is an integer number (10743234).

Almost surely, 2^21486467 is an apocalyptic number.

21486467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21486467 is an equidigital number, since it uses as much as digits as its factorization.

21486467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The square root of 21486467 is about 4635.3497171195. The cubic root of 21486467 is about 278.0065341873.

The spelling of 21486467 in words is "twenty-one million, four hundred eighty-six thousand, four hundred sixty-seven".