21419907 has 8 divisors (see below), whose sum is σ = 28583184. Its totient is φ = 14268288.

The previous prime is 21419903. The next prime is 21419911. The reversal of 21419907 is 70991412.

It is an interprime number because it is at equal distance from previous prime (21419903) and next prime (21419911).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21419907 - 2² = 21419903 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21419903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3223 + ... + 7295.

It is an arithmetic number, because the mean of its divisors is an integer number (3572898).

Almost surely, 2^21419907 is an apocalyptic number.

21419907 is a deficient number, since it is larger than the sum of its proper divisors (7163277).

21419907 is a wasteful number, since it uses less digits than its factorization.

21419907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5829.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 21419907 is about 4628.1645389938. The cubic root of 21419907 is about 277.7191710610.

The spelling of 21419907 in words is "twenty-one million, four hundred nineteen thousand, nine hundred seven".