21248950 has 24 divisors (see below), whose sum is σ = 40800960. Its totient is φ = 8224800.

The previous prime is 21248921. The next prime is 21248957. The reversal of 21248950 is 5984212.

It is a super-2 number, since 2×21248950² = 903035752205000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21248957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5305 + ... + 8404.

It is an arithmetic number, because the mean of its divisors is an integer number (1700040).

Almost surely, 2^21248950 is an apocalyptic number.

21248950 is a deficient number, since it is larger than the sum of its proper divisors (19552010).

21248950 is a wasteful number, since it uses less digits than its factorization.

21248950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13752 (or 13747 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 21248950 is about 4609.6583387492. The cubic root of 21248950 is about 276.9783506911.

The spelling of 21248950 in words is "twenty-one million, two hundred forty-eight thousand, nine hundred fifty".