21416967 has 60 divisors (see below), whose sum is σ = 38480904. Its totient is φ = 11702880.

The previous prime is 21416953. The next prime is 21416987. The reversal of 21416967 is 76961412.

It is not a de Polignac number, because 21416967 - 2⁷ = 21416839 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 498048 + ... + 498090.

Almost surely, 2^21416967 is an apocalyptic number.

21416967 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21416967 is a deficient number, since it is larger than the sum of its proper divisors (17063937).

21416967 is a wasteful number, since it uses less digits than its factorization.

21416967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 70 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 21416967 is about 4627.8469075802. The cubic root of 21416967 is about 277.7064643186.

The spelling of 21416967 in words is "twenty-one million, four hundred sixteen thousand, nine hundred sixty-seven".