21492067 has 2 divisors, whose sum is σ = 21492068. Its totient is φ = 21492066.

The previous prime is 21492061. The next prime is 21492151. The reversal of 21492067 is 76029412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21492067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21492061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10746033 + 10746034.

It is an arithmetic number, because the mean of its divisors is an integer number (10746034).

Almost surely, 2^21492067 is an apocalyptic number.

21492067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21492067 is an equidigital number, since it uses as much as digits as its factorization.

21492067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21492067 is about 4635.9537314343. The cubic root of 21492067 is about 278.0306842932.

The spelling of 21492067 in words is "twenty-one million, four hundred ninety-two thousand, sixty-seven".