21950452 has 12 divisors (see below), whose sum is σ = 38568096. Its totient is φ = 10931000.

The previous prime is 21950447. The next prime is 21950459. The reversal of 21950452 is 25405912.

It is a self number, because there is not a number n which added to its sum of digits gives 21950452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21950459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9928 + ... + 11935.

It is an arithmetic number, because the mean of its divisors is an integer number (3214008).

Almost surely, 2^21950452 is an apocalyptic number.

It is an amenable number.

21950452 is a deficient number, since it is larger than the sum of its proper divisors (16617644).

21950452 is a wasteful number, since it uses less digits than its factorization.

21950452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22118 (or 22116 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 21950452 is about 4685.1309480099. The cubic root of 21950452 is about 279.9934182126.

The spelling of 21950452 in words is "twenty-one million, nine hundred fifty thousand, four hundred fifty-two".