21196967 has 8 divisors (see below), whose sum is σ = 23749392. Its totient is φ = 18748800.

The previous prime is 21196949. The next prime is 21197017. The reversal of 21196967 is 76969112.

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

It is a cyclic number.

It is not a de Polignac number, because 21196967 - 2⁸ = 21196711 is a prime.

It is a super-2 number, since 2×21196967² = 898622819998178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21196907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25634 + ... + 26447.

It is an arithmetic number, because the mean of its divisors is an integer number (2968674).

Almost surely, 2^21196967 is an apocalyptic number.

21196967 is a deficient number, since it is larger than the sum of its proper divisors (2552425).

21196967 is a wasteful number, since it uses less digits than its factorization.

21196967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52129.

The product of its digits is 40824, while the sum is 41.

The square root of 21196967 is about 4604.0163987545. The cubic root of 21196967 is about 276.7523015182.

The spelling of 21196967 in words is "twenty-one million, one hundred ninety-six thousand, nine hundred sixty-seven".