21460946 has 8 divisors (see below), whose sum is σ = 34667724. Its totient is φ = 9905040.

The previous prime is 21460939. The next prime is 21460949. The reversal of 21460946 is 64906412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21114025 + 346921 = 4595^2 + 589^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21460949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412685 + ... + 412736.

Almost surely, 2^21460946 is an apocalyptic number.

21460946 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21460946 is a deficient number, since it is larger than the sum of its proper divisors (13206778).

21460946 is a wasteful number, since it uses less digits than its factorization.

21460946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825436.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 21460946 is about 4632.5960324639. The cubic root of 21460946 is about 277.8964212234.

The spelling of 21460946 in words is "twenty-one million, four hundred sixty thousand, nine hundred forty-six".