21950744 has 16 divisors (see below), whose sum is σ = 42162120. Its totient is φ = 10707520.

The previous prime is 21950737. The next prime is 21950771. The reversal of 21950744 is 44705912.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21950744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33134 + ... + 33789.

Almost surely, 2^21950744 is an apocalyptic number.

It is an amenable number.

21950744 is a deficient number, since it is larger than the sum of its proper divisors (20211376).

21950744 is a wasteful number, since it uses less digits than its factorization.

21950744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66970 (or 66966 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 21950744 is about 4685.1621103223. The cubic root of 21950744 is about 279.9946597621.

The spelling of 21950744 in words is "twenty-one million, nine hundred fifty thousand, seven hundred forty-four".