21196954 has 8 divisors (see below), whose sum is σ = 31909428. Its totient is φ = 10560480.

The previous prime is 21196949. The next prime is 21197017. The reversal of 21196954 is 45969112.

It can be written as a sum of positive squares in 2 ways, for example, as 17413929 + 3783025 = 4173^2 + 1945^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18297 + ... + 19420.

Almost surely, 2^21196954 is an apocalyptic number.

21196954 is a deficient number, since it is larger than the sum of its proper divisors (10712474).

21196954 is a wasteful number, since it uses less digits than its factorization.

21196954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38000.

The product of its digits is 19440, while the sum is 37.

The square root of 21196954 is about 4604.0149869435. The cubic root of 21196954 is about 276.7522449413.

The spelling of 21196954 in words is "twenty-one million, one hundred ninety-six thousand, nine hundred fifty-four".