21494950 has 12 divisors (see below), whose sum is σ = 39980700. Its totient is φ = 8597960.

The previous prime is 21494929. The next prime is 21494959. The reversal of 21494950 is 5949412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21494959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214900 + ... + 214999.

It is an arithmetic number, because the mean of its divisors is an integer number (3331725).

Almost surely, 2^21494950 is an apocalyptic number.

21494950 is a deficient number, since it is larger than the sum of its proper divisors (18485750).

21494950 is a wasteful number, since it uses less digits than its factorization.

21494950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429911 (or 429906 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 21494950 is about 4636.2646602626. The cubic root of 21494950 is about 278.0431156494.

The spelling of 21494950 in words is "twenty-one million, four hundred ninety-four thousand, nine hundred fifty".