21146954 has 8 divisors (see below), whose sum is σ = 31896228. Its totient is φ = 10514880.

The previous prime is 21146953. The next prime is 21146969. The reversal of 21146954 is 45964112.

It can be written as a sum of positive squares in 2 ways, for example, as 20948929 + 198025 = 4577^2 + 445^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21146954.

It is not an unprimeable number, because it can be changed into a prime (21146953) 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 3 ways as a sum of consecutive naturals, for example, 28847 + ... + 29570.

Almost surely, 2^21146954 is an apocalyptic number.

21146954 is a deficient number, since it is larger than the sum of its proper divisors (10749274).

21146954 is a wasteful number, since it uses less digits than its factorization.

21146954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58600.

The product of its digits is 8640, while the sum is 32.

The square root of 21146954 is about 4598.5817378840. The cubic root of 21146954 is about 276.5344698352.

The spelling of 21146954 in words is "twenty-one million, one hundred forty-six thousand, nine hundred fifty-four".