21449950 has 24 divisors (see below), whose sum is σ = 40030920. Its totient is φ = 8551200.

The previous prime is 21449947. The next prime is 21449957. The reversal of 21449950 is 5994412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21449957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20541 + ... + 21559.

It is an arithmetic number, because the mean of its divisors is an integer number (1667955).

Almost surely, 2^21449950 is an apocalyptic number.

21449950 is a deficient number, since it is larger than the sum of its proper divisors (18580970).

21449950 is a wasteful number, since it uses less digits than its factorization.

21449950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1447 counting only the distinct ones).

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

The square root of 21449950 is about 4631.4090728417. The cubic root of 21449950 is about 277.8489509474.

The spelling of 21449950 in words is "twenty-one million, four hundred forty-nine thousand, nine hundred fifty".